This document discusses data security and authentication using steganography and the STS protocol. It proposes a new approach that uses steganography to hide encrypted messages within images by generating a stego-key through the STS key exchange protocol. The STS protocol provides authentication by requiring signatures, while steganography further protects the data by concealing the encrypted messages within cover files like images. The document analyzes how combining steganography with cryptography and key exchange protocols like STS can enhance data security.
This seminar report discusses symmetric key cryptography and proposes a new symmetric key algorithm. It begins with an introduction to cryptography and the importance of security. It then describes the two main types of cryptography: symmetric key and asymmetric key. Symmetric key cryptography uses a single key for both encryption and decryption, while asymmetric key uses different public and private keys. The report proposes a new symmetric key algorithm that uses simple steps of generating binary values, reversing numbers, dividing, and adding remainders and quotients. It claims this new algorithm is well-suited for encrypting small amounts of data in a cost-effective way. The report concludes the algorithm is simple but secure due to reverse operations, and the next step is developing a public
A RSA- DWT Based Visual Cryptographic Steganogrphy Technique by Mohit GoelMohit Goel
1) The document presents a technique for visual cryptographic steganography that uses RSA encryption and discrete wavelet transform (DWT) for data security.
2) In the proposed method, data is first encrypted using RSA encryption and then embedded in an image using Haar-DWT based steganography.
3) Experimental results on 100 images show the proposed technique achieves higher PSNR values compared to other techniques like LSB and LSB-DCT steganography, indicating better image quality and security of the hidden data.
This document provides an overview of network security and cryptography. It discusses the history and basic concepts of networking and security. The document covers risk management, network threats like viruses and denial of service attacks. It also explains different network security methods like virtual private networks (VPNs), firewalls, and IPSec. Cryptography techniques like secret key cryptography, public key cryptography, hash functions, and authentication methods are summarized. Popular cryptographic algorithms and protocols like PGP, SHA, and AAA servers are also mentioned.
Review on variants of Security aware AODVijsrd.com
Mobile ad-hoc network (MANET) is very sensitive network to security due to challenging characteristic such as decentralization, dynamic changing topology, and neighbor based routing. All existing MANET protocol are simply trust their neighbor and make route through them due to neighbor based routing network is disturbed by malicious node or intruder. Trust calculation is challenging task due to computation complexity constraints in MANET. In this paper we have presented variants of trust based security protocol in an on demand distance vector routing protocol and also proposed new mechanism for Network coding with RSA based Encryption and Decryption in an AODV which will improve the security level of MANET with acceptable overhead limit.
The document provides information about the members of a group - Abdullah Rashid Baig, Adnan Haider, Muhammad Zakria, and Muhammad Zeeshan Khan. It then provides definitions and explanations of cryptography, cryptographic algorithms, encryption, decryption, plaintext, ciphertext, keys, secret key cryptography, public key cryptography, hashing, digital signatures, and security goals like confidentiality, authentication, integrity, availability, non-repudiation, and access control. It also discusses potential attacks on cryptography like viruses, traffic analysis, electromagnetic detection, and dictionary attacks.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document summarizes and analyzes several signcryption schemes based on elliptic curves. Signcryption allows for both encryption and digital signing to be performed in one logical step, reducing computational costs compared to traditional signature-then-encryption schemes. The document analyzes schemes by Zheng and Imai, Bao & Deng, Gamage et al, and Jung et al in terms of security goals achieved, communication overhead, and computational costs. It finds that while all schemes achieve confidentiality, integrity, and unforgeability, they differ in supporting features like forward secrecy and public verification. The Zheng & Imai scheme has the lowest computational costs but lacks forward secrecy and public verification.
This seminar report discusses symmetric key cryptography and proposes a new symmetric key algorithm. It begins with an introduction to cryptography and the importance of security. It then describes the two main types of cryptography: symmetric key and asymmetric key. Symmetric key cryptography uses a single key for both encryption and decryption, while asymmetric key uses different public and private keys. The report proposes a new symmetric key algorithm that uses simple steps of generating binary values, reversing numbers, dividing, and adding remainders and quotients. It claims this new algorithm is well-suited for encrypting small amounts of data in a cost-effective way. The report concludes the algorithm is simple but secure due to reverse operations, and the next step is developing a public
A RSA- DWT Based Visual Cryptographic Steganogrphy Technique by Mohit GoelMohit Goel
1) The document presents a technique for visual cryptographic steganography that uses RSA encryption and discrete wavelet transform (DWT) for data security.
2) In the proposed method, data is first encrypted using RSA encryption and then embedded in an image using Haar-DWT based steganography.
3) Experimental results on 100 images show the proposed technique achieves higher PSNR values compared to other techniques like LSB and LSB-DCT steganography, indicating better image quality and security of the hidden data.
This document provides an overview of network security and cryptography. It discusses the history and basic concepts of networking and security. The document covers risk management, network threats like viruses and denial of service attacks. It also explains different network security methods like virtual private networks (VPNs), firewalls, and IPSec. Cryptography techniques like secret key cryptography, public key cryptography, hash functions, and authentication methods are summarized. Popular cryptographic algorithms and protocols like PGP, SHA, and AAA servers are also mentioned.
Review on variants of Security aware AODVijsrd.com
Mobile ad-hoc network (MANET) is very sensitive network to security due to challenging characteristic such as decentralization, dynamic changing topology, and neighbor based routing. All existing MANET protocol are simply trust their neighbor and make route through them due to neighbor based routing network is disturbed by malicious node or intruder. Trust calculation is challenging task due to computation complexity constraints in MANET. In this paper we have presented variants of trust based security protocol in an on demand distance vector routing protocol and also proposed new mechanism for Network coding with RSA based Encryption and Decryption in an AODV which will improve the security level of MANET with acceptable overhead limit.
The document provides information about the members of a group - Abdullah Rashid Baig, Adnan Haider, Muhammad Zakria, and Muhammad Zeeshan Khan. It then provides definitions and explanations of cryptography, cryptographic algorithms, encryption, decryption, plaintext, ciphertext, keys, secret key cryptography, public key cryptography, hashing, digital signatures, and security goals like confidentiality, authentication, integrity, availability, non-repudiation, and access control. It also discusses potential attacks on cryptography like viruses, traffic analysis, electromagnetic detection, and dictionary attacks.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
This document summarizes and analyzes several signcryption schemes based on elliptic curves. Signcryption allows for both encryption and digital signing to be performed in one logical step, reducing computational costs compared to traditional signature-then-encryption schemes. The document analyzes schemes by Zheng and Imai, Bao & Deng, Gamage et al, and Jung et al in terms of security goals achieved, communication overhead, and computational costs. It finds that while all schemes achieve confidentiality, integrity, and unforgeability, they differ in supporting features like forward secrecy and public verification. The Zheng & Imai scheme has the lowest computational costs but lacks forward secrecy and public verification.
Hybrid cryptographic technique using rsa algorithm and scheduling conceptsIJNSA Journal
The RSA algorithm is one of the most commonly used efficient cryptographic algorithms. It provides the required amount of confidentiality, data integrity and privacy. This paper integrates the RSA Algorithm with round -robin priority scheduling scheme in order to extend the level of security and reduce the effectiveness of intrusion. It aims at obtaining minimal overhead, increased throughput and privacy. In this method the user uses the RSA algorithm and generates the encrypted messages that are sorted priority-wise and then sent. The receiver, on receiving the messages decrypts them using the RSA algorithm according to their priority. This method reduces the risk of man -in-middle attacks and timing attacks as the encrypted and decrypted messages are further jumbled based on their priority. It also reduces the power monitoring
attack risk if a very small amount of information is exchanged. It raises the bar on the standards of
information security, ensuring more efficiency.
- Cryptography and Security
- Methods of Encryption and Decryption
- What is an Algorithm?
- Symmetric Algorithm
- Asymmetric Algorithm
- Hybrid Encryption
- Hashing Algorithm
- Securing the Algorithm or the Key
- Hash Value and Rainbow Table
- Digital Signature
- PKI
This document provides a survey of metamorphic cryptography techniques. It begins with an introduction to cryptography and steganography individually, explaining how cryptography encrypts messages and steganography hides messages. It then discusses the benefits of combining these approaches in metamorphic cryptography, including providing multiple layers of security. Two examples of metamorphic cryptography techniques are described: one using static parsing steganography to hide bits of a secret message in cover image pixels, and another combining AES encryption with discrete cosine transform to hide encrypted text in an image. The document concludes that non-metamorphic approaches are less secure because they rely on single methodologies and simpler encoding algorithms.
Cryptographic Algorithms For Secure Data CommunicationCSCJournals
Personal privacy is of utmost importance in the global networked world. One of the best tools to help people safeguard their personal information is the use of cryptography. In this paper we present new cryptographic algorithms that employ the use of asymmetric keys. The proposed algorithms encipher message into nonlinear equations using public key and decipher by the intended party using private key. If a third party intercepted the message, it will be difficult to decipher it due to the multilevel ciphers of the proposed application.
The document describes a thesis submitted by Amogh Mahapatra and Rajballav Dash for their Bachelor of Technology degree. It examines using the Hill cipher technique and self-repetitive matrices for data encryption and decryption. Specifically, it proposes an innovation to the conventional Hill cipher method using the concept of self-repetitive matrices. This approach is mathematically derived and implemented to simulate a communication channel with compression techniques. The method aims to address issues with inverting the Hill cipher's multiplicative matrix by using periodically repeating matrices.
The document provides an overview of a course on PKI (Public Key Infrastructure) technology. It outlines the topics that will be covered over two days, including secret key cryptography algorithms like AES and RSA, digital certificates, certificate authorities, and practical PKI applications like S/MIME, SSL, and IPSEC. The objectives of the course are to understand cryptographic fundamentals, public key infrastructure elements and how they interact, and why PKI is useful for enabling e-commerce and enhancing security.
Analysis of Cryptographic Algorithms for Network SecurityEditor IJCATR
This document discusses and analyzes various cryptographic algorithms used for network security. It begins with definitions of key cryptographic terms like plain text, cipher text, encryption, decryption, and keys. It then describes different types of cryptographic schemes, including symmetric, asymmetric, and hash functions. Specific algorithms are analyzed like DES, AES, RSA, and Diffie-Hellman. Factors to consider when selecting a cryptographic algorithm like speed, memory requirements, security needs, and data type are also discussed. Overall the document provides a comprehensive overview and comparison of cryptographic algorithms and their applications for network security.
SECURE CLOUD STORAGE USING DENIABLE ATTRIBUTE BASED ENCRYPTIONadeij1
Cloud storage services are a lot of well-liked today . To secure information from those that don't have access, several encoding schemes are projected. Most of the projected schemes assume cloud storage service suppliers or trustworthy third parties handling key management are trustworthy and can't be hacked; but, in follow, some entities could intercept communications between users and cloud storage suppliers and so compel storage suppliers to unleash user secrets by victimisation government power or alternative means that. During this case, encrypted information are assumed to be identified and storage suppliers are requested to unleash user secrets. Since it's tough to fight against outside coercion, we tend to aimed to create Associate in Nursing encoding theme that might facilitate cloud storage suppliers avoid this plight. We provide cloud storage suppliers means that to make pretend user secrets. Given such pretend user secrets, outside coercers will solely obtained solid information from a user’s keep cipher text. Once coercers suppose the received secrets are real, they'll be happy and a lot of significantly cloud storage suppliers won't have discovered any real secrets. Therefore, user privacy continues to be protected.
A comparative study of symmetric key algorithm des, aes and blowfish for vide...pankaj kumari
Cryptography means storing and transmitting data or information in a particular form that allow to be kept secret.
Symmetric key cryptography:- Both sender and receiver share the secret key.The symmetric key is kept private.both parties use the same key for encryption and decryption.
Asymmetric key cryptography:- Asymmetric key cryptography uses public or private key for encryption and decryption.Public key is kept by publically and private is kept secret.sender use the public key to send message and receiver use the private or secret key to decrypt the message.
This document discusses the importance of cryptography and PKI for ensuring security, privacy, and authentication in digital communications. It addresses the three main goals of cryptography - confidentiality, integrity, and availability. The document then provides an overview of cryptographic algorithms, including symmetric and asymmetric encryption as well as hash functions. It also discusses common cryptanalytic attacks and how the strength of encryption increases exponentially with longer key sizes, making brute-force attacks infeasible for sufficiently long keys.
Secured Paillier Homomorphic Encryption Scheme Based on the Residue Number Sy...ijcisjournal
In this paper, we present an improved Paillier Cryptosystem for a secured data transmission based on the
Residue Number System (RNS). The current state of Paillier Cryptosystem allows the computation of the
plaintext from the cipher text without solving its security assumption of Decisional Composite Residuosity
or the knowledge of its private keys under mathematical attacks
The document discusses techniques for steganography, or hiding secret messages within other files or media. It describes how steganography works by hiding a secret message within a cover file using a stego function. Modern steganography hides information in digital files like images, audio, video and network packets. Specific techniques discussed include hiding data in the least significant bits of image pixel values or varying the spacing between letters in plain text. Steganography aims to conceal the very existence of the hidden message.
A Robust Cryptographic System using Neighborhood-Generated KeysIJORCS
The document discusses various cryptographic techniques for encrypting data, including symmetric, asymmetric, stream ciphers, block ciphers, and hashing. Symmetric cryptography uses the same key for encryption and decryption, while asymmetric cryptography uses public and private key pairs. Common attacks on cryptographic systems are also outlined, such as known-plaintext attacks where an attacker has plaintext and ciphertext, chosen-plaintext attacks where an attacker can select plaintext to encrypt, and side-channel attacks which analyze power consumption or timing. The document provides background information on existing cryptographic techniques and attacks.
Topics listed below are explained in the PPT:
Introduction
CIA Triad
Mechanisms of Cryptography
OSI Security Architecture
Security Attacks
Security Mechanisms
Security Services
Cryptography vs Steganography
Network Security Model
Cryptographic techniques
Stream Cipher vs Block cipher
This document describes a student project to study and implement the Data Encryption Standard (DES) algorithm on an FPGA. It includes a certificate verifying the project was completed by four students under the guidance of Professor R. Hemalatha to fulfill requirements for a Bachelor of Engineering degree. The project report contains sections on cryptography basics, the DES algorithm, encoding and decoding methods, and results of implementing DES on an FPGA.
A digital code that can be attached to an electronically transmitted message that uniquely identifies the sender. Like a written signature, the purpose of a digital signature is to guarantee that the individual sending the message really is who he or she claims to be. Digital signatures are especially important for electronic commerce and are a key component of most authentication schemes. To be effective, digital signatures must be unforgettable. There are a number of different encryption techniques to guarantee this level of security.
The document discusses various topics related to network security:
1. It provides examples of social engineering techniques like pretending to be a network administrator to obtain passwords.
2. It defines denial of service attacks and lists features like flood attacks and SYN attacks that overwhelm the target with useless traffic.
3. It explains honeypots are traps that appear to contain valuable information but are actually isolated and monitored to detect unauthorized access attempts.
4. It also covers encryption methods like RSA and digital signatures, and distinguishes between biometrics and computer forensics techniques.
This document discusses improved K-means clustering techniques. It begins with an introduction to data mining and clustering. K-means clustering groups data objects into k clusters by minimizing distances between objects and cluster centers. However, K-means has limitations such as dependency on initialization. The document proposes a new clustering algorithm that uses an iterative relocation technique and distance determination approach to improve upon K-means clustering. It compares the computational complexity of K-means and K-medoids clustering algorithms.
This document proposes a solution to detect and remove black hole attacks in mobile ad-hoc networks. It begins by describing the black hole attack problem, where a malicious node pretends to have routes to destinations and absorbs network traffic. It then presents a detection technique that involves: (1) making the requesting node wait for multiple route replies instead of immediately sending data, (2) storing the replies in tables to compare sequence numbers and times, and (3) repeating the route discovery with a different destination to obtain multiple reply tables to identify inconsistencies that reveal black hole nodes. This proposed solution aims to identify black holes and find safe routes that avoid them.
This document discusses usability engineering and its activities. It defines usability engineering as a user-centered process that ensures systems are effective, efficient, and safe. The key activities discussed are:
1) Domain analysis to understand users and tasks
2) Expert evaluation where usability experts evaluate designs against guidelines
3) Formative usability evaluation where representative users perform tasks while being observed to identify usability problems
This document proposes a solution called CloudVision to help cloud providers troubleshoot problems reported by users. CloudVision would automatically track configuration changes to virtual machine instances and store this information in a database. When users report problems, CloudVision analyzes the configuration history to identify potential causes. It then takes predefined actions to check and solve problems by interacting with the configuration of VM instances. The goal is to help providers address user problems more quickly through automated problem reasoning and interactive troubleshooting based on visibility into VM configuration events and lifecycles.
This document summarizes a research paper that proposes a Cooperative Multi-Hop Clustering Protocol to reduce the energy consumption of mobile devices using WLAN. The protocol uses Bluetooth to form clusters with one cluster head and multiple regular nodes. The cluster head remains connected to the WLAN to allow regular nodes to access the WLAN through Bluetooth at a lower power. The protocol selects cluster heads based on factors like energy, number of neighbors, and distance to the access point. It dynamically reforms clusters based on node energy usage and bandwidth needs. Simulation results show the approach effectively reduces WLAN power consumption for networks of over 200 nodes.
Hybrid cryptographic technique using rsa algorithm and scheduling conceptsIJNSA Journal
The RSA algorithm is one of the most commonly used efficient cryptographic algorithms. It provides the required amount of confidentiality, data integrity and privacy. This paper integrates the RSA Algorithm with round -robin priority scheduling scheme in order to extend the level of security and reduce the effectiveness of intrusion. It aims at obtaining minimal overhead, increased throughput and privacy. In this method the user uses the RSA algorithm and generates the encrypted messages that are sorted priority-wise and then sent. The receiver, on receiving the messages decrypts them using the RSA algorithm according to their priority. This method reduces the risk of man -in-middle attacks and timing attacks as the encrypted and decrypted messages are further jumbled based on their priority. It also reduces the power monitoring
attack risk if a very small amount of information is exchanged. It raises the bar on the standards of
information security, ensuring more efficiency.
- Cryptography and Security
- Methods of Encryption and Decryption
- What is an Algorithm?
- Symmetric Algorithm
- Asymmetric Algorithm
- Hybrid Encryption
- Hashing Algorithm
- Securing the Algorithm or the Key
- Hash Value and Rainbow Table
- Digital Signature
- PKI
This document provides a survey of metamorphic cryptography techniques. It begins with an introduction to cryptography and steganography individually, explaining how cryptography encrypts messages and steganography hides messages. It then discusses the benefits of combining these approaches in metamorphic cryptography, including providing multiple layers of security. Two examples of metamorphic cryptography techniques are described: one using static parsing steganography to hide bits of a secret message in cover image pixels, and another combining AES encryption with discrete cosine transform to hide encrypted text in an image. The document concludes that non-metamorphic approaches are less secure because they rely on single methodologies and simpler encoding algorithms.
Cryptographic Algorithms For Secure Data CommunicationCSCJournals
Personal privacy is of utmost importance in the global networked world. One of the best tools to help people safeguard their personal information is the use of cryptography. In this paper we present new cryptographic algorithms that employ the use of asymmetric keys. The proposed algorithms encipher message into nonlinear equations using public key and decipher by the intended party using private key. If a third party intercepted the message, it will be difficult to decipher it due to the multilevel ciphers of the proposed application.
The document describes a thesis submitted by Amogh Mahapatra and Rajballav Dash for their Bachelor of Technology degree. It examines using the Hill cipher technique and self-repetitive matrices for data encryption and decryption. Specifically, it proposes an innovation to the conventional Hill cipher method using the concept of self-repetitive matrices. This approach is mathematically derived and implemented to simulate a communication channel with compression techniques. The method aims to address issues with inverting the Hill cipher's multiplicative matrix by using periodically repeating matrices.
The document provides an overview of a course on PKI (Public Key Infrastructure) technology. It outlines the topics that will be covered over two days, including secret key cryptography algorithms like AES and RSA, digital certificates, certificate authorities, and practical PKI applications like S/MIME, SSL, and IPSEC. The objectives of the course are to understand cryptographic fundamentals, public key infrastructure elements and how they interact, and why PKI is useful for enabling e-commerce and enhancing security.
Analysis of Cryptographic Algorithms for Network SecurityEditor IJCATR
This document discusses and analyzes various cryptographic algorithms used for network security. It begins with definitions of key cryptographic terms like plain text, cipher text, encryption, decryption, and keys. It then describes different types of cryptographic schemes, including symmetric, asymmetric, and hash functions. Specific algorithms are analyzed like DES, AES, RSA, and Diffie-Hellman. Factors to consider when selecting a cryptographic algorithm like speed, memory requirements, security needs, and data type are also discussed. Overall the document provides a comprehensive overview and comparison of cryptographic algorithms and their applications for network security.
SECURE CLOUD STORAGE USING DENIABLE ATTRIBUTE BASED ENCRYPTIONadeij1
Cloud storage services are a lot of well-liked today . To secure information from those that don't have access, several encoding schemes are projected. Most of the projected schemes assume cloud storage service suppliers or trustworthy third parties handling key management are trustworthy and can't be hacked; but, in follow, some entities could intercept communications between users and cloud storage suppliers and so compel storage suppliers to unleash user secrets by victimisation government power or alternative means that. During this case, encrypted information are assumed to be identified and storage suppliers are requested to unleash user secrets. Since it's tough to fight against outside coercion, we tend to aimed to create Associate in Nursing encoding theme that might facilitate cloud storage suppliers avoid this plight. We provide cloud storage suppliers means that to make pretend user secrets. Given such pretend user secrets, outside coercers will solely obtained solid information from a user’s keep cipher text. Once coercers suppose the received secrets are real, they'll be happy and a lot of significantly cloud storage suppliers won't have discovered any real secrets. Therefore, user privacy continues to be protected.
A comparative study of symmetric key algorithm des, aes and blowfish for vide...pankaj kumari
Cryptography means storing and transmitting data or information in a particular form that allow to be kept secret.
Symmetric key cryptography:- Both sender and receiver share the secret key.The symmetric key is kept private.both parties use the same key for encryption and decryption.
Asymmetric key cryptography:- Asymmetric key cryptography uses public or private key for encryption and decryption.Public key is kept by publically and private is kept secret.sender use the public key to send message and receiver use the private or secret key to decrypt the message.
This document discusses the importance of cryptography and PKI for ensuring security, privacy, and authentication in digital communications. It addresses the three main goals of cryptography - confidentiality, integrity, and availability. The document then provides an overview of cryptographic algorithms, including symmetric and asymmetric encryption as well as hash functions. It also discusses common cryptanalytic attacks and how the strength of encryption increases exponentially with longer key sizes, making brute-force attacks infeasible for sufficiently long keys.
Secured Paillier Homomorphic Encryption Scheme Based on the Residue Number Sy...ijcisjournal
In this paper, we present an improved Paillier Cryptosystem for a secured data transmission based on the
Residue Number System (RNS). The current state of Paillier Cryptosystem allows the computation of the
plaintext from the cipher text without solving its security assumption of Decisional Composite Residuosity
or the knowledge of its private keys under mathematical attacks
The document discusses techniques for steganography, or hiding secret messages within other files or media. It describes how steganography works by hiding a secret message within a cover file using a stego function. Modern steganography hides information in digital files like images, audio, video and network packets. Specific techniques discussed include hiding data in the least significant bits of image pixel values or varying the spacing between letters in plain text. Steganography aims to conceal the very existence of the hidden message.
A Robust Cryptographic System using Neighborhood-Generated KeysIJORCS
The document discusses various cryptographic techniques for encrypting data, including symmetric, asymmetric, stream ciphers, block ciphers, and hashing. Symmetric cryptography uses the same key for encryption and decryption, while asymmetric cryptography uses public and private key pairs. Common attacks on cryptographic systems are also outlined, such as known-plaintext attacks where an attacker has plaintext and ciphertext, chosen-plaintext attacks where an attacker can select plaintext to encrypt, and side-channel attacks which analyze power consumption or timing. The document provides background information on existing cryptographic techniques and attacks.
Topics listed below are explained in the PPT:
Introduction
CIA Triad
Mechanisms of Cryptography
OSI Security Architecture
Security Attacks
Security Mechanisms
Security Services
Cryptography vs Steganography
Network Security Model
Cryptographic techniques
Stream Cipher vs Block cipher
This document describes a student project to study and implement the Data Encryption Standard (DES) algorithm on an FPGA. It includes a certificate verifying the project was completed by four students under the guidance of Professor R. Hemalatha to fulfill requirements for a Bachelor of Engineering degree. The project report contains sections on cryptography basics, the DES algorithm, encoding and decoding methods, and results of implementing DES on an FPGA.
A digital code that can be attached to an electronically transmitted message that uniquely identifies the sender. Like a written signature, the purpose of a digital signature is to guarantee that the individual sending the message really is who he or she claims to be. Digital signatures are especially important for electronic commerce and are a key component of most authentication schemes. To be effective, digital signatures must be unforgettable. There are a number of different encryption techniques to guarantee this level of security.
The document discusses various topics related to network security:
1. It provides examples of social engineering techniques like pretending to be a network administrator to obtain passwords.
2. It defines denial of service attacks and lists features like flood attacks and SYN attacks that overwhelm the target with useless traffic.
3. It explains honeypots are traps that appear to contain valuable information but are actually isolated and monitored to detect unauthorized access attempts.
4. It also covers encryption methods like RSA and digital signatures, and distinguishes between biometrics and computer forensics techniques.
This document discusses improved K-means clustering techniques. It begins with an introduction to data mining and clustering. K-means clustering groups data objects into k clusters by minimizing distances between objects and cluster centers. However, K-means has limitations such as dependency on initialization. The document proposes a new clustering algorithm that uses an iterative relocation technique and distance determination approach to improve upon K-means clustering. It compares the computational complexity of K-means and K-medoids clustering algorithms.
This document proposes a solution to detect and remove black hole attacks in mobile ad-hoc networks. It begins by describing the black hole attack problem, where a malicious node pretends to have routes to destinations and absorbs network traffic. It then presents a detection technique that involves: (1) making the requesting node wait for multiple route replies instead of immediately sending data, (2) storing the replies in tables to compare sequence numbers and times, and (3) repeating the route discovery with a different destination to obtain multiple reply tables to identify inconsistencies that reveal black hole nodes. This proposed solution aims to identify black holes and find safe routes that avoid them.
This document discusses usability engineering and its activities. It defines usability engineering as a user-centered process that ensures systems are effective, efficient, and safe. The key activities discussed are:
1) Domain analysis to understand users and tasks
2) Expert evaluation where usability experts evaluate designs against guidelines
3) Formative usability evaluation where representative users perform tasks while being observed to identify usability problems
This document proposes a solution called CloudVision to help cloud providers troubleshoot problems reported by users. CloudVision would automatically track configuration changes to virtual machine instances and store this information in a database. When users report problems, CloudVision analyzes the configuration history to identify potential causes. It then takes predefined actions to check and solve problems by interacting with the configuration of VM instances. The goal is to help providers address user problems more quickly through automated problem reasoning and interactive troubleshooting based on visibility into VM configuration events and lifecycles.
This document summarizes a research paper that proposes a Cooperative Multi-Hop Clustering Protocol to reduce the energy consumption of mobile devices using WLAN. The protocol uses Bluetooth to form clusters with one cluster head and multiple regular nodes. The cluster head remains connected to the WLAN to allow regular nodes to access the WLAN through Bluetooth at a lower power. The protocol selects cluster heads based on factors like energy, number of neighbors, and distance to the access point. It dynamically reforms clusters based on node energy usage and bandwidth needs. Simulation results show the approach effectively reduces WLAN power consumption for networks of over 200 nodes.
This document proposes a novel technique to detect multiple faults in an automobile engine using sound signals collected from a single microphone sensor. It describes experiments conducted using a Maruti Alto 800cc 4-cylinder engine. Three types of faults are considered: 1) knocking fault, 2) insufficient lubricant fault, and 3) excessive lubricant fault. Sound features are extracted from the engine and analyzed using artificial neural networks to classify the engine condition as normal or faulty. The technique aims to provide simple fault detection using a single sensor compared to existing methods that use separate sensors for each fault.
This document provides an overview of grid computing. It discusses that grid computing enables sharing, selection, and aggregation of distributed resources like supercomputers, storage, and data sources. Grid computing allows for these resources to be used as a unified virtual machine. The document then discusses the services offered by grids including computational, data, application, information, and knowledge services. It also discusses the types of grids like computational grids, data grids, and scavenging grids. Finally, it discusses some of the key advantages of grid computing like making better use of available hardware and idle computing resources.
Applications of RSA and AES256 in End-to-End encryption using Diffie- Hellman...IRJET Journal
This document discusses end-to-end encryption using Diffie-Hellman key exchange combined with RSA and AES256 encryption. It proposes a model where a server facilitates encrypted communication between two clients by first distributing Diffie-Hellman parameters. The clients then use their private keys to calculate a shared secret and encrypt it with the other client's public key before transmission to establish an encrypted channel. RSA is used to encrypt the Diffie-Hellman key exchange to prevent man-in-the-middle attacks. The document provides details on the Diffie-Hellman, RSA and AES256 algorithms and evaluates the performance of the proposed approach.
This document provides an overview of steganography and its modules for a PowerPoint presentation. Steganography is the art of hiding communication by concealing messages within other information. It uses various techniques to hide information in digital images or audio files. The presentation covers the encryption and decryption modules used for steganography. Encryption hides data in a host file using an algorithm while decryption extracts the data using the reverse algorithm. The modules create an application for encrypting and decrypting data files within media files to perform steganography.
This document summarizes a research paper on using cryptography and steganography for data security. It discusses how both cryptography and steganography can be used to securely transmit confidential information, but combining them provides additional security. The document then provides background on cryptography and steganography techniques. It explains symmetric and asymmetric encryption, and algorithms like AES, DES, and Diffie-Hellman. It also discusses how the paper aims to develop a new system that embeds encrypted data using steganography for enhanced security. In under 3 sentences.
HYBRID CRYPTOGRAPHIC TECHNIQUE USING RSA ALGORITHM AND SCHEDULING CONCEPTSIJNSA Journal
The RSA algorithm is one of the most commonly used efficient cryptographic algorithms. It provides the required amount of confidentiality, data integrity and privacy. This paper integrates the RSA Algorithm with round-robin priority scheduling scheme in order to extend the level of security and reduce the effectiveness of intrusion. It aims at obtaining minimal overhead, increased throughput and privacy. In this method the user uses the RSA algorithm and generates the encrypted messages that are sorted priority-wise and then sent. The receiver, on receiving the messages decrypts them using the RSA algorithm according to their priority. This method reduces the risk of man-in-middle attacks and timing attacks as the encrypted and decrypted messages are further jumbled based on their priority. It also reduces the power monitoring attack risk if a very small amount of information is exchanged. It raises the bar on the standards of information security, ensuring more efficiency.
ASSOCIATION OF CRYPTOGRAPHY AND STEGANOGRAPHYAsia Smith
This document discusses cryptography and steganography techniques for securing communications. It defines cryptography as encoding messages to disguise their meaning and steganography as hiding messages within other files to conceal their existence. The document proposes combining these methods by encrypting a message with cryptography and then hiding the encrypted output in a file like an image using steganography. This provides two layers of security that are harder for attackers to breach than a single technique alone. The document also compares and contrasts cryptography and steganography, discusses different types of each technique, and analyzes the benefits of an integrated cryptographic-steganographic approach to security.
Diffie Hellman key exchange allows two parties to jointly establish a secret key over an insecure channel through modular exponentiation and prime number properties. It is a foundational concept in public key cryptography and secure communication protocols. The algorithm works by having each party select a private key to calculate a public key using agreed-upon parameters. They exchange public keys to independently derive the shared secret key without transmitting it. While secure when implemented correctly, vulnerabilities like man-in-the-middle attacks require careful consideration in applications. Diffie Hellman key exchange remains important for privacy and security in networking.
Diffie Hellman key exchange allows two parties to jointly establish a secret key over an insecure channel through modular exponentiation and prime number properties. It is a foundational concept in public key cryptography and secure communication protocols. The algorithm works by having each party select a private key to calculate a public key using agreed-upon parameters. They exchange public keys to independently derive the shared secret key without transmitting it. While secure when implemented correctly, vulnerabilities like man-in-the-middle attacks require careful consideration in applications. Diffie Hellman key exchange remains important for privacy and security in networking.
This document provides an overview of cryptography. It discusses that cryptography is the practice of secure communication in the presence of others. The purpose of cryptography is to defend against hackers and industrial espionage while securing e-commerce, bank accounts, intellectual property, and avoiding liability. Cryptography provides authentication, privacy, integrity, and non-repudiation. Encryption converts plain text to cipher text using a key while decryption converts cipher text to plain text. Common cryptographic algorithms are secret key cryptography, public key cryptography, and hash functions. Secret key cryptography uses a private key for encryption while public key cryptography uses a public key exchanged over an insecure channel. Hash functions produce a checksum of data. AES encryption is now commonly used and
Achieving data integrity by forming the digital signature using RSA and SHA-1...IOSR Journals
This document discusses achieving data integrity through digital signatures using the RSA and SHA-1 algorithms. It first provides background on data integrity and cryptography. It then explains the RSA algorithm for public key encryption and digital signatures. The document describes an implementation of RSA and SHA-1 to encrypt messages and generate message digests at the sender and receiver ends to verify data integrity by ensuring the digests match. Graphical interfaces are provided to enhance understanding and the system is designed with client and server architecture to demonstrate the process across different computers.
This document discusses network security and provides information on several related topics in 3 paragraphs or less:
It begins with an overview of a general model for network security that involves designing secure algorithms, generating and distributing secret information, and specifying communication protocols. It then explains the principles of symmetric and asymmetric cryptography, noting examples like AES and RSA. The document concludes with a brief discussion of digital signatures and their importance in message authentication and ensuring data integrity.
Secret writing refers to cryptography and steganography. Cryptography involves encrypting messages so only authorized users can read them, while steganography hides information within other files or mediums. Common cryptographic techniques include symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key between sender and receiver, while asymmetric encryption uses public and private key pairs. Steganography hides information by embedding it within images or other files.
Modified RSA-based algorithm: a double secure approachTELKOMNIKA JOURNAL
Security algorithms like RSA are becoming increasingly important for communications to provide companies, organizations, and users around the world, secure applications who rely heavily on them in their daily work. Security algorithms use different acquaintances among companies which might belong to various countries or even cities. Such data should essentially be encrypted to make sure that there is security in transportation. Thus, the current research paper leads to the novel system of security for the safe transfer of data. This paper examines the general principles of encryption and focuses on the development of RSA and the complexity of the encryption key so that it becomes more secure in the applications used. In this project, we will work on the RSA algorithm by adding some complexity to the 3keys (3k). This addition will increase the security and complexity of the algorithm's speed while maintaining encryption and decryption time. The paper also presents an approach by means of public key encryption to enhance cryptographic security. Moreover, double security is provided by the algorithm of RSA. This novel RSA algorithm was investigated in MATLAB. Numerical results for the various parameters such as Mean Square Error (MSE), correlation and Bit Error Ratio (BER) were implemented for the encryption of the message. The experimental results demonstrated that the proposed algorithm for 3 keys has small error rate in the retrieval of the encoded text
The document discusses various topics related to public key cryptography including:
1) Public key cryptography uses key pairs (public/private keys) to encrypt and decrypt messages securely. Private keys are kept secret while public keys can be openly distributed.
2) RSA is a commonly used public key cryptosystem that uses large prime numbers to encrypt data. It is considered secure if a large enough key is used.
3) Digital signatures authenticate messages by encrypting a hash of the message with the sender's private key, allowing verification with their public key.
Performance Comparison of File Security System using TEA and Blowfish Algorithmsijtsrd
With the progress in data exchange by the electronic system, the need for information security has become a necessity. Due to the growth of multimedia application, security becomes an important issue of communication and storage of different files. To make its reality, cryptographic algorithms are widely used as essential tools. Cryptographic algorithms provide security services such as confidentiality, authentication, data integrity and secrecy by encryption. Different cryptographic algorithms are commonly used for information security in many research areas. Although there are two encryption techniques, asymmetric and symmetric, the simpler symmetric encryption technique is employed for testing file security system. In this study, the performance evaluation of the most common two symmetric encryption algorithms such as TEA and Blowfish algorithm is focused on the execution time intervals. Simulation has been conducted with many types of file encryption like .pdf, .txt, .doc, .docx, .xlsx, .pptx, .ppt, .xls, .jpg, .png and most common video file formats by using Java Programming Language. Win Myat Thu | Tin Lai Win | Su Mu Tyar "Performance Comparison of File Security System using TEA and Blowfish Algorithms" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd26462.pdfPaper URL: https://www.ijtsrd.com/engineering/computer-engineering/26462/performance-comparison-of-file-security-system-using-tea-and-blowfish-algorithms/win-myat-thu
Cryptography is the science of securing communication and information. It involves encrypting data using mathematical algorithms and decrypting it using keys. The main types of cryptography are symmetric key which uses a shared key for encryption and decryption, and asymmetric or public key which uses separate public and private keys.
RSA is a commonly used public key algorithm. It generates a public and private key pair, where the public key is used to encrypt messages and the private key decrypts them. Digital signatures authenticate messages using public key cryptography and allow message verification through signature validation.
Hash functions are mathematical transformations that map data into fixed size outputs. They are commonly used in digital signatures to hash message contents. Popular hash functions include MD5, SHA
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
A novel approach to information security using safe exchange of encrypted dat...eSAT Journals
Abstract In this modern era, with the vast improvement in the field of internet, security is a major issue at hand. A lot of crimes, or to say, hacking is prevalent. This system "Safe Exchange of Encrypted Data (SEED)" handles sharing secret data between the sender and receiver in a cryptic manner by providing a new approach to symmetric encryption with ensured confidentiality, authenticity, integrity and availability of a secure communication, and protection against Man-in-the-Middle attacks even without a Public Key Infrastructure (PKI) or endpoint certificates, in the unprotected network space. This system makes use of an efficient concept called 'ephemeral shared session key', which being a combination of public and private keys can only be generated at both ends and negates the need of having to transmit a symmetric key between the users. The text data is encrypted using a new symmetric key algorithm known as “Xenacrypt” which is more secure than any other existing symmetric key algorithms. This system provides integrity through an efficient algorithm which we have implemented to indicate data thefts by any malicious attacks or threats. Application of this crypto-system will have a huge impact in the future of transmitting secure data especially in the field of business transaction and military operations. Keywords:-encryption;signed diffie hellman;signature;VOIP Integrity,verification,decryption,authentication.
This document discusses cryptography, which is the science of secure communication. It covers the basics of cryptography including its objectives, components, terminology, types, and advantages. Specifically, it explains how cryptography ensures confidentiality, integrity, and authentication of information. It also discusses symmetric and asymmetric encryption methods. Symmetric encryption uses a shared key for encryption and decryption while asymmetric encryption uses public and private key pairs. The document highlights how cryptography provides secure communication methods and is important for both military and everyday applications.
This document provides an overview of cryptography. Cryptography is the practice of hiding information to ensure confidentiality, integrity, and authentication. There are two main types: secret key cryptography which uses a single key for encryption and decryption, and public key cryptography which uses separate public and private keys. Popular cryptographic algorithms include RSA and hash functions. Cryptography aims to provide security against common attacks such as ciphertext-only attacks.
The document analyzes microstrip transmission lines using a quasi-static approach. It presents numerically efficient and accurate formulas to analyze microstrip line structures. The analysis derives formulas for characteristic impedance of microstrip lines based on variables like the normalized strip width, effective permittivity, height of the substrate, and thickness of the microstrip line. It also defines the structure of a microstrip line and formulates the quasi-static analysis by introducing the concept of an effective relative dielectric constant to account for the microstrip being surrounded by different dielectrics like air and the substrate material.
This document summarizes conventional and soft computing techniques for color image segmentation. It begins with an introduction to image segmentation and discusses how color images contain more information than grayscale images. The document then provides an overview of conventional segmentation algorithms, categorizing them as edge-based, region-based, or clustering-based methods. It also introduces soft computing techniques like fuzzy logic, neural networks, and genetic algorithms as promising approaches for color image segmentation, noting that these methods are complementary rather than competitive.
This document summarizes a research paper that proposes a technique for classifying brain CT scan images using principal component analysis (PCA), wavelet transform, and K-nearest neighbors (K-NN) classification. The methodology involves extracting features from CT scan images using PCA and wavelet transform, then training a K-NN classifier on the extracted features to classify images as normal or abnormal. PCA achieved 100% accuracy on brain CT scans, while wavelet transform achieved 100% accuracy on Brodatz texture images. The technique provides an automated way to analyze CT scans and could help radiologists in diagnosis.
This document presents a new algorithm for automatically detecting driver drowsiness based on electroencephalography (EEG) using Mahalanobis distance. EEG signals are measured by placing electrodes on the driver's head. Two main approaches for detecting drowsiness are analyzing physical changes like head position and measuring physiological changes like brain activity. This algorithm focuses on the second approach using EEG signals, which can accurately track alertness levels second-to-second. It first establishes a model of alert brain activity using multivariate normal distribution of EEG theta and alpha rhythms. Mahalanobis distance is then used to detect drowsiness by measuring deviation from the alert model.
1) The document discusses image segmentation in satellite images using optimal texture measures. It evaluates four texture measures from the gray-level co-occurrence matrix (GLCM) with six different window sizes.
2) Principal Component Analysis (PCA) is applied to reduce the texture measures to a manageable size while retaining discrimination information.
3) The methodology consists of selecting an optimal window size and optimal texture measure. A 7x7 window size provided superior performance for classification. PCA is used to analyze correlations between texture measures and window sizes.
This document discusses using a relevance vector machine (RVM) for classifying remotely sensed images. It proposes a methodology that involves extracting features from remote sensing images using wavelet transforms, then classifying the features using an RVM. The RVM classification results in fewer "relevance vectors" than other methods, allowing for faster classification, which is important for applications requiring low complexity or real-time classification. The document provides background on RVMs and describes the key steps of the proposed classification methodology.
This document discusses the development of an embedded web server using an ARM processor to monitor and control systems remotely. It provides background on the growing use of embedded web servers and Internet of Things applications. The paper then describes implementing TCP/IP networking on an ARM processor to enable Ethernet connectivity and allow the device to function as a web server. This allows various devices to connect and be controlled over the Internet through a standardized web interface using only a browser. The embedded web server provides a uniform interface for accessing traditional devices remotely. The rest of the paper details the hardware, web server implementation, and software concepts to realize this embedded web server functionality.
1) The document discusses security threats related to data mining tools used in programs like the Terrorism Information Awareness (TIA) program. It outlines threats such as predicting classified information, detecting hidden information, and mining open source data to predict events.
2) The document proposes some methods to improve security, such as restricting access, using data mining for crime detection/prevention, and employing multilevel security models.
3) The authors acknowledge they are in the early stages of research on using technology-based analysis tools rather than statistical approaches for identifying potential terrorists in large pools of data. They outline future work such as person identification without relying only on statistical comparisons.
This document summarizes a research paper that proposes a secure routing protocol called CA-AOMDV for mobile ad hoc networks (MANETs). CA-AOMDV extends the AOMDV routing protocol to be aware of channel conditions and selects multiple disjoint paths based on predicted link lifetimes. It uses the Secure Hash Algorithm 1 (SHA-1) to guarantee integrity in the network. The paper reviews AOMDV and introduces how CA-AOMDV incorporates channel properties into route discovery and maintenance to choose more reliable paths based on predicted link lifetimes calculated from node speeds and a channel model.
This document provides a comparative analysis of various cloud service providers. It begins with an introduction to cloud computing and techniques for optimal service selection. Then it presents a table comparing prominent cloud service providers like Amazon AWS, Google App Engine, Windows Azure, Force.com, Rackspace and GoGrid. The table compares their cloud tools, platforms supported, programming languages, premium support pricing policies and data backup strategies to help users understand and reasonably choose a suitable provider. The aim is to focus on decision making for optimal service selection through this brief comparative analysis.
This document summarizes research on improving search engine efficiency by maximizing the retrieval of information related to person names and aliases. It discusses how search engines work, including web crawling to index pages and information retrieval techniques to match queries. The authors propose using anchor text mining to create a graph of co-occurrence relationships between names and aliases in order to automatically discover association orders between them. This would allow search engines to better tag aliases according to their order of association, improving recall and mean reciprocal rank when searching for information on person names.
This document summarizes a research paper on modeling DC-DC converters with high frequencies using state space analysis. The paper presents an approach to modeling that avoids assuming constant current ripples, allowing for a better representation at high frequencies. State space averaging is commonly used to model PWM DC-DC converters but has limitations. The presented approach generalizes state space averaging to account for harmonics' effects, transforming time-varying models into time-invariant linear models. Equations for the state space model of a buck converter are provided both when operating and when turned off, and the average state model is derived. The goal is to improve performance for load and input variations through implicit feedforward compensation.
1) The document discusses channel estimation techniques for 4G wireless networks using OFDM modulation.
2) Channel estimation is important for coherent detection and diversity techniques in wireless systems, which have time-varying channels. Accurate channel estimation allows techniques like maximal ratio combining.
3) OFDM divides the channel into multiple sub-carriers to combat multipath fading and make channel equalization easier compared to single carrier systems. Channel estimation is needed to characterize the time-varying frequency response of the wireless channel.
This document proposes an adaptive mobility-aware medium access control (MAC) protocol called MMAC-SW for wireless sensor networks. MMAC-SW uses a hybrid TDMA/CSMA approach and incorporates sleep-wake cycling to improve energy efficiency. It dynamically adjusts the frame length based on a mobility prediction model to adapt to changing network conditions. Simulation results show that MMAC-SW outperforms the baseline MMAC protocol in terms of energy consumption, packet delivery ratio, and average packet delay.
This document discusses an efficient deconvolution algorithm using dual-tree complex wavelet transform. It begins with an introduction to deconvolution and its challenges. Specifically, it notes that deconvolution is an ill-posed inverse problem and traditional methods can amplify noise. The document then reviews previous work on Fourier-domain and wavelet-based deconvolution techniques. It proposes a new two-step algorithm using a Wiener filter for global blur compensation followed by local denoising with dual-tree complex wavelet transform. This approach aims to convert the deconvolution problem into an easier non-white noise removal problem while exploiting properties of the dual-tree complex wavelet like shift-invariance and directionality to remove noise without assumptions on the
This document discusses network traffic monitoring using the Winpcap packet capturing tool. It begins with an introduction to enterprise network monitoring and requirements. It then provides an overview of Winpcap, including its architecture and how it works. Key aspects covered include the packet capture driver, Packet.dll, and WinPcap.dll libraries. The document also discusses related tools like Jpcap for Java packet capturing. It concludes with an overview of a sample network traffic monitoring application that implements packet capturing using Winpcap.
This document discusses two designs of microstrip patch antennas. Design 1 is a rectangular microstrip patch antenna that achieves a 13.1% bandwidth. Design 2 is a gap-coupled reduced size rectangular microstrip patch antenna that achieves an enhanced 20.5% bandwidth through the use of parasitic patches placed along the edges of the fed rectangular patch. Simulation results show that Design 2 provides both an improvement in bandwidth and directivity over Design 1.
This document summarizes a research paper on handwritten script recognition using soft computing techniques. The paper aims to recognize Hindi, English, and Urdu scripts using a combined approach of discrete cosine transform (DCT) and discrete wavelet transform (DWT) for feature extraction, and a neural network classifier. A database containing 961 handwritten samples across the three scripts was created, with 320 samples per script varying in font size. The system achieved a recognition accuracy of 82.70% on the test dataset containing 480 samples. The paper provides background on challenges in multi-script recognition and discusses preprocessing, segmentation, feature extraction and representation steps prior to classification.
This document summarizes frequent itemset mining algorithms. It introduces data mining and the Apriori algorithm. Apriori generates candidate itemsets and prunes those that are not frequent by scanning the database multiple times. The document proposes two new algorithms to improve efficiency: Impression reduces scans by pruning candidates using an impression table, while Transaction Database Spin reduces the database size between iterations by removing transactions not containing large itemsets. Both aim to reduce database access compared to Apriori.
This document describes the design of a high-speed Gray to binary code converter using a novel two transistor XOR gate. It introduces a low power and area efficient Gray to binary converter implemented using a two transistor XOR gate designed with two PMOS transistors. The converter and XOR gate are designed and simulated using Mentor Graphics tools. Simulation results show the converter has very low power dissipation and area requirements compared to other code converter designs.
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor IvaniukFwdays
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
Dandelion Hashtable: beyond billion requests per second on a commodity serverAntonios Katsarakis
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
What is an RPA CoE? Session 2 – CoE RolesDianaGray10
In this session, we will review the players involved in the CoE and how each role impacts opportunities.
Topics covered:
• What roles are essential?
• What place in the automation journey does each role play?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems
This talk will cover ScyllaDB Architecture from the cluster-level view and zoom in on data distribution and internal node architecture. In the process, we will learn the secret sauce used to get ScyllaDB's high availability and superior performance. We will also touch on the upcoming changes to ScyllaDB architecture, moving to strongly consistent metadata and tablets.
In the realm of cybersecurity, offensive security practices act as a critical shield. By simulating real-world attacks in a controlled environment, these techniques expose vulnerabilities before malicious actors can exploit them. This proactive approach allows manufacturers to identify and fix weaknesses, significantly enhancing system security.
This presentation delves into the development of a system designed to mimic Galileo's Open Service signal using software-defined radio (SDR) technology. We'll begin with a foundational overview of both Global Navigation Satellite Systems (GNSS) and the intricacies of digital signal processing.
The presentation culminates in a live demonstration. We'll showcase the manipulation of Galileo's Open Service pilot signal, simulating an attack on various software and hardware systems. This practical demonstration serves to highlight the potential consequences of unaddressed vulnerabilities, emphasizing the importance of offensive security practices in safeguarding critical infrastructure.
Essentials of Automations: Exploring Attributes & Automation ParametersSafe Software
Building automations in FME Flow can save time, money, and help businesses scale by eliminating data silos and providing data to stakeholders in real-time. One essential component to orchestrating complex automations is the use of attributes & automation parameters (both formerly known as “keys”). In fact, it’s unlikely you’ll ever build an Automation without using these components, but what exactly are they?
Attributes & automation parameters enable the automation author to pass data values from one automation component to the next. During this webinar, our FME Flow Specialists will cover leveraging the three types of these output attributes & parameters in FME Flow: Event, Custom, and Automation. As a bonus, they’ll also be making use of the Split-Merge Block functionality.
You’ll leave this webinar with a better understanding of how to maximize the potential of automations by making use of attributes & automation parameters, with the ultimate goal of setting your enterprise integration workflows up on autopilot.
GlobalLogic Java Community Webinar #18 “How to Improve Web Application Perfor...GlobalLogic Ukraine
Під час доповіді відповімо на питання, навіщо потрібно підвищувати продуктивність аплікації і які є найефективніші способи для цього. А також поговоримо про те, що таке кеш, які його види бувають та, основне — як знайти performance bottleneck?
Відео та деталі заходу: https://bit.ly/45tILxj
"Choosing proper type of scaling", Olena SyrotaFwdays
Imagine an IoT processing system that is already quite mature and production-ready and for which client coverage is growing and scaling and performance aspects are life and death questions. The system has Redis, MongoDB, and stream processing based on ksqldb. In this talk, firstly, we will analyze scaling approaches and then select the proper ones for our system.
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Keywords: AI, Containeres, Kubernetes, Cloud Native
Event Link: https://meine.doag.org/events/cloudland/2024/agenda/#agendaId.4211
[OReilly Superstream] Occupy the Space: A grassroots guide to engineering (an...Jason Yip
The typical problem in product engineering is not bad strategy, so much as “no strategy”. This leads to confusion, lack of motivation, and incoherent action. The next time you look for a strategy and find an empty space, instead of waiting for it to be filled, I will show you how to fill it in yourself. If you’re wrong, it forces a correction. If you’re right, it helps create focus. I’ll share how I’ve approached this in the past, both what works and lessons for what didn’t work so well.
"NATO Hackathon Winner: AI-Powered Drug Search", Taras KlobaFwdays
This is a session that details how PostgreSQL's features and Azure AI Services can be effectively used to significantly enhance the search functionality in any application.
In this session, we'll share insights on how we used PostgreSQL to facilitate precise searches across multiple fields in our mobile application. The techniques include using LIKE and ILIKE operators and integrating a trigram-based search to handle potential misspellings, thereby increasing the search accuracy.
We'll also discuss how the azure_ai extension on PostgreSQL databases in Azure and Azure AI Services were utilized to create vectors from user input, a feature beneficial when users wish to find specific items based on text prompts. While our application's case study involves a drug search, the techniques and principles shared in this session can be adapted to improve search functionality in a wide range of applications. Join us to learn how PostgreSQL and Azure AI can be harnessed to enhance your application's search capability.
Introducing BoxLang : A new JVM language for productivity and modularity!Ortus Solutions, Corp
Just like life, our code must adapt to the ever changing world we live in. From one day coding for the web, to the next for our tablets or APIs or for running serverless applications. Multi-runtime development is the future of coding, the future is to be dynamic. Let us introduce you to BoxLang.
Dynamic. Modular. Productive.
BoxLang redefines development with its dynamic nature, empowering developers to craft expressive and functional code effortlessly. Its modular architecture prioritizes flexibility, allowing for seamless integration into existing ecosystems.
Interoperability at its Core
With 100% interoperability with Java, BoxLang seamlessly bridges the gap between traditional and modern development paradigms, unlocking new possibilities for innovation and collaboration.
Multi-Runtime
From the tiny 2m operating system binary to running on our pure Java web server, CommandBox, Jakarta EE, AWS Lambda, Microsoft Functions, Web Assembly, Android and more. BoxLang has been designed to enhance and adapt according to it's runnable runtime.
The Fusion of Modernity and Tradition
Experience the fusion of modern features inspired by CFML, Node, Ruby, Kotlin, Java, and Clojure, combined with the familiarity of Java bytecode compilation, making BoxLang a language of choice for forward-thinking developers.
Empowering Transition with Transpiler Support
Transitioning from CFML to BoxLang is seamless with our JIT transpiler, facilitating smooth migration and preserving existing code investments.
Unlocking Creativity with IDE Tools
Unleash your creativity with powerful IDE tools tailored for BoxLang, providing an intuitive development experience and streamlining your workflow. Join us as we embark on a journey to redefine JVM development. Welcome to the era of BoxLang.
Northern Engraving | Nameplate Manufacturing Process - 2024Northern Engraving
Manufacturing custom quality metal nameplates and badges involves several standard operations. Processes include sheet prep, lithography, screening, coating, punch press and inspection. All decoration is completed in the flat sheet with adhesive and tooling operations following. The possibilities for creating unique durable nameplates are endless. How will you create your brand identity? We can help!
"Scaling RAG Applications to serve millions of users", Kevin GoedeckeFwdays
How we managed to grow and scale a RAG application from zero to thousands of users in 7 months. Lessons from technical challenges around managing high load for LLMs, RAGs and Vector databases.
QA or the Highway - Component Testing: Bridging the gap between frontend appl...zjhamm304
These are the slides for the presentation, "Component Testing: Bridging the gap between frontend applications" that was presented at QA or the Highway 2024 in Columbus, OH by Zachary Hamm.
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectorsDianaGray10
Join us to learn how UiPath Apps can directly and easily interact with prebuilt connectors via Integration Service--including Salesforce, ServiceNow, Open GenAI, and more.
The best part is you can achieve this without building a custom workflow! Say goodbye to the hassle of using separate automations to call APIs. By seamlessly integrating within App Studio, you can now easily streamline your workflow, while gaining direct access to our Connector Catalog of popular applications.
We’ll discuss and demo the benefits of UiPath Apps and connectors including:
Creating a compelling user experience for any software, without the limitations of APIs.
Accelerating the app creation process, saving time and effort
Enjoying high-performance CRUD (create, read, update, delete) operations, for
seamless data management.
Speakers:
Russell Alfeche, Technology Leader, RPA at qBotic and UiPath MVP
Charlie Greenberg, host