This document provides an overview of cryptography concepts including symmetric and asymmetric encryption, hash functions, and cryptographic algorithms like the Enigma machine and the Data Encryption Standard (DES). It discusses how Enigma worked using electromechanical rotors to scramble letters and how settings were changed daily to encrypt messages. It also explains the design of DES, including its use of Feistel networks, substitution boxes, and key scheduling to encrypt data in 64-bit blocks using a 56-bit key. The document notes attacks that have been performed on DES like brute force searches and analytic attacks like differential and linear cryptanalysis. It concludes with discussing principles for designing secure block ciphers.
Cryptography is the process of securing communication and information. It involves encrypting plaintext into ciphertext using algorithms and decrypting the ciphertext back to plaintext. The main goals of cryptography are confidentiality, integrity, non-repudiation, authentication, access control, and availability. There are three main types of cryptographic algorithms - secret key cryptography which uses the same key for encryption and decryption, public key cryptography which uses different keys for encryption and decryption, and hash functions which are one-way functions to encrypt information irreversibly. Common cryptographic hash functions include MD5 and SHA-1 which are used to verify integrity of files and messages.
The document contains a series of questions and answers related to the topics of cryptography and network security. It is divided into 5 units, with questions ranging from defining basic terms to explaining concepts in more depth. Some of the questions ask for examples or demonstrations of algorithms and techniques. The document serves as a study guide or practice test for a course on cryptography and security.
The document contains a series of questions and answers related to the topics of cryptography and network security. It is divided into 5 units, with questions ranging from basic concepts and definitions to practical applications and algorithms. Some of the key topics covered include symmetric and asymmetric encryption, cryptanalysis techniques like brute force attacks, cryptographic hash functions, digital signatures, authentication protocols, and network security mechanisms like IPsec.
This document contains questions and answers related to the topics of cryptography and network security. It covers topics such as information security, data integrity, cryptanalysis, cryptographic algorithms, symmetric and asymmetric key cryptography, hashing, digital signatures, network attacks, and security protocols. The questions range from definitions of technical terms to short explanations of cryptographic concepts and mechanisms.
This document provides an overview of cryptography concepts and algorithms. It discusses symmetric and asymmetric encryption algorithms such as DES, AES, RSA. It also covers hashing algorithms like MD5 and SHA which are used to generate cryptographic checksums of documents. The key ideas are that encryption encodes information, decryption decodes it, symmetric algorithms use the same key for both, and asymmetric algorithms use different public/private keys for encryption and decryption respectively.
Cryptography involves encrypting and decrypting information using algorithms and keys. There are two main types: public key cryptography uses different keys for encryption and decryption while private (symmetric) key cryptography uses the same key. Digital signatures provide authentication by encrypting a hash of a message with a private key so receivers can validate the sender. Key management and distribution present challenges to ensure secrecy and prevent unauthorized access.
The document discusses various cryptographic concepts and algorithms. It begins with basic terms in cryptography like plain text, cipher text, encryption, decryption, and keys. It then explains symmetric and asymmetric key cryptography. Specific algorithms discussed include MD5, SHA-1, SHA-256, RIPEMD-160, and crypt. Code examples are provided to demonstrate generating hashes using these algorithms.
This document provides an overview of cryptography and related concepts across 11 pages. It discusses cryptography techniques like symmetric and asymmetric encryption, hashing algorithms, and digital certificates. It also covers public key infrastructure (PKI) components like certificate authorities (CAs), digital signatures, and revocation. Common applications of cryptography like IPsec, SSL, and PGP are also summarized. The document aims to explain fundamental cryptography concepts and how they are applied in various technologies and situations.
Cryptography is the process of securing communication and information. It involves encrypting plaintext into ciphertext using algorithms and decrypting the ciphertext back to plaintext. The main goals of cryptography are confidentiality, integrity, non-repudiation, authentication, access control, and availability. There are three main types of cryptographic algorithms - secret key cryptography which uses the same key for encryption and decryption, public key cryptography which uses different keys for encryption and decryption, and hash functions which are one-way functions to encrypt information irreversibly. Common cryptographic hash functions include MD5 and SHA-1 which are used to verify integrity of files and messages.
The document contains a series of questions and answers related to the topics of cryptography and network security. It is divided into 5 units, with questions ranging from defining basic terms to explaining concepts in more depth. Some of the questions ask for examples or demonstrations of algorithms and techniques. The document serves as a study guide or practice test for a course on cryptography and security.
The document contains a series of questions and answers related to the topics of cryptography and network security. It is divided into 5 units, with questions ranging from basic concepts and definitions to practical applications and algorithms. Some of the key topics covered include symmetric and asymmetric encryption, cryptanalysis techniques like brute force attacks, cryptographic hash functions, digital signatures, authentication protocols, and network security mechanisms like IPsec.
This document contains questions and answers related to the topics of cryptography and network security. It covers topics such as information security, data integrity, cryptanalysis, cryptographic algorithms, symmetric and asymmetric key cryptography, hashing, digital signatures, network attacks, and security protocols. The questions range from definitions of technical terms to short explanations of cryptographic concepts and mechanisms.
This document provides an overview of cryptography concepts and algorithms. It discusses symmetric and asymmetric encryption algorithms such as DES, AES, RSA. It also covers hashing algorithms like MD5 and SHA which are used to generate cryptographic checksums of documents. The key ideas are that encryption encodes information, decryption decodes it, symmetric algorithms use the same key for both, and asymmetric algorithms use different public/private keys for encryption and decryption respectively.
Cryptography involves encrypting and decrypting information using algorithms and keys. There are two main types: public key cryptography uses different keys for encryption and decryption while private (symmetric) key cryptography uses the same key. Digital signatures provide authentication by encrypting a hash of a message with a private key so receivers can validate the sender. Key management and distribution present challenges to ensure secrecy and prevent unauthorized access.
The document discusses various cryptographic concepts and algorithms. It begins with basic terms in cryptography like plain text, cipher text, encryption, decryption, and keys. It then explains symmetric and asymmetric key cryptography. Specific algorithms discussed include MD5, SHA-1, SHA-256, RIPEMD-160, and crypt. Code examples are provided to demonstrate generating hashes using these algorithms.
This document provides an overview of cryptography and related concepts across 11 pages. It discusses cryptography techniques like symmetric and asymmetric encryption, hashing algorithms, and digital certificates. It also covers public key infrastructure (PKI) components like certificate authorities (CAs), digital signatures, and revocation. Common applications of cryptography like IPsec, SSL, and PGP are also summarized. The document aims to explain fundamental cryptography concepts and how they are applied in various technologies and situations.
1. The document discusses the principles of symmetric encryption, including the use of a secret key, plaintext, ciphertext, encryption and decryption algorithms.
2. It describes the Feistel cipher structure, which uses rounds of processing and subkeys to encrypt plaintext blocks. Parameters like block size, key size, and number of rounds determine the security level.
3. The Data Encryption Standard (DES) algorithm is discussed as the most widely used conventional encryption scheme. It uses a 56-bit key to encrypt 64-bit blocks via initial permutation, multiple rounds of processing, and final permutation.
Encrypted Negative Password using for Authenticationijtsrd
This document proposes a new password authentication system that uses encrypted negative passwords (ENPs) for secure password storage and authentication. It involves hashing the password, converting it to a negative value, and encrypting it using strong algorithms like PBKDF2 and Blowfish. This makes the passwords more secure against attacks like dictionary attacks and lookup table attacks compared to existing systems. The proposed system includes a registration phase where the password is processed to generate the ENP, and an authentication phase where the ENP is validated upon login. Advantages of the system include stronger security, resistance to various attacks, and easy integration with existing authentication systems.
This document discusses the RSA network security approach. It begins with an introduction to RSA, describing how it uses large prime numbers and exponentiation to encrypt and decrypt messages. It also discusses how RSA can be used for both encryption and digital signatures to provide authentication. The document then covers symmetric and public key cryptography concepts before focusing more on the specifics of the RSA algorithm and its use for secure network communications.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Symmetric encryption uses the same key for both encryption and decryption. It has five components: plaintext, encryption algorithm, secret key, ciphertext, and decryption algorithm. The security depends on keeping the key secret. Symmetric encryption is classified by the type of operations used, number of keys, and how plaintext is processed. Common symmetric algorithms like DES and AES encrypt plaintext in blocks using a substitution-permutation network structure.
The document discusses cryptography concepts such as encryption algorithms, key management, digital signatures, and cryptanalysis attacks. It covers symmetric and asymmetric cryptographic systems as well as specific algorithms like DES, RSA, and elliptic curve cryptography. The document also examines requirements for secrecy, authenticity and properties of cryptographic systems.
This document provides an overview of encryption and authentication methods. It discusses symmetric key encryption where both computers share a secret key, and public key encryption which uses digital certificates from a certificate authority to allow secure communication without pre-shared keys. Popular implementations of public key encryption include SSL and TLS, which use certificates to verify identities and encrypt data, then employ symmetric encryption for efficiency. Hashing algorithms are also discussed, which create unique values from input data to serve as keys in an irreversible way, ensuring security.
Security+ Guide to Network Security Fundamentals, 3rd Edition, by Mark Ciampa
Knowledge and skills required for Network Administrators and Information Technology professionals to be aware of security vulnerabilities, to implement security measures, to analyze an existing network environment in consideration of known security threats or risks, to defend against attacks or viruses, and to ensure data privacy and integrity. Terminology and procedures for implementation and configuration of security, including access control, authorization, encryption, packet filters, firewalls, and Virtual Private Networks (VPNs).
CNIT 120: Network Security
http://samsclass.info/120/120_S09.shtml#lecture
Policy: http://samsclass.info/policy_use.htm
Many thanks to Sam Bowne for allowing to publish these presentations.
Cryptography is the process of encrypting and decrypting data to protect it from unauthorized access. The document discusses the history of cryptography from early substitution ciphers to modern algorithms like AES. It describes symmetric cryptography which uses a single key and asymmetric cryptography which uses public/private key pairs. Popular algorithms for encryption, digital signatures, and hashing are also outlined along with attacks that can compromise cryptosystems like brute force and man-in-the-middle attacks.
Comparative Analysis of Cryptographic Algorithms and Advanced Cryptographic A...editor1knowledgecuddle
Today is the era of Internet and networks applications. So,Information security is a challenging issue in today’s technological world. There is a demand for a stronger encryption which is very hard to crack. The role of Cryptography is most important in the field of network security. There is a broad range of cryptographic algorithms that are used for securing networks and presently continuous researches on the new cryptographic algorithms are going on for evolving more advanced techniques for secures
communication. In this study is made for the cryptography algorithms, particularly algorithms- AES, DES, RSA, Blowfishare compared and performance is evaluated. Also some enhanced algorithms are described and compared with the enhanced algorithms.
Keywords - AES, DES, BLOWFISH, Decryption, Encryption, Security
The document describes the history and types of cryptography. It discusses symmetric and asymmetric cryptography algorithms such as DES, AES, RSA, and Diffie-Hellman. It also covers cryptanalysis techniques like brute force attacks and digital signatures. Public key infrastructure (PKI) uses digital certificates to authenticate users, while protocols like PGP, S/MIME, and PEM can encrypt email messages.
This document provides instructions on how to hack passwords and create an FTP server on a PC. It discusses techniques like hashing, guessing, using default passwords, brute force attacks, and phishing to hack passwords. It also describes how to crack Windows passwords using tools like Cain and Abel. Additionally, it outlines the steps to obtain a static IP address, install and configure an FTP server software, and set up user accounts on the server.
This document provides an overview of key concepts in DNSSEC including public/private keys, message digests or hashes, and digital signatures. It explains that public/private key pairs are used, where the private key is kept secret and the public key can be freely distributed. It also describes how one-way hashing functions work to generate fixed-length hashes from variable-length data, and how digital signatures are created by encrypting a message hash with a private key. These three concepts of public/private keys, hashes, and digital signatures form the basis of cryptographic techniques used in DNSSEC.
Documenting Software Architectural Component and Connector with UML 2editor1knowledgecuddle
One of the major challenges facing consultants today is maintaining a level of knowledge of leading and emerging technologies, beyond the superficial or buzzword level. We need to develop a level of understanding that allows us to communicate effectively with both suppliers and customers.Digital signature scheme is a fundamental cryptographic tool which allows one to sign an electronic message and later the produced signature can be verified by the owner of the message. This paper presents a digital signature scheme and discusses the security aspects of proposed digital signature scheme. This paper provides a literature review and analysis of the security systems and the emphasis is on digital signature, hashed message algorithm. Keywords:Digital signature, Hashed message algorithm, MD5 Algorithm, Public key encryption, SHA2 Algorithm.
1) Password cracking is the process of recovering secret passwords through various techniques like hashing, guessing using dictionaries, using default passwords, brute force, and phishing.
2) Common password cracking techniques include exploiting weak hashing algorithms, guessing using common words and personal details, using default passwords for applications, trying all possible character combinations through brute force, and tricking users into revealing passwords through phishing.
3) IP spoofing involves modifying the source IP address field in the IP packet header to disguise the identity of the sender or impersonate another system and exploit weaknesses in the connection-oriented TCP protocol.
This document provides an overview of cryptographic algorithms and their uses. It begins with symmetric encryption, which uses a single secret key to encrypt and decrypt data, providing confidentiality. The most common symmetric algorithms are the Data Encryption Standard (DES) and the Advanced Encryption Standard (AES), which are block ciphers that encrypt data in fixed-size blocks. It also discusses stream ciphers, which encrypt data one element at a time. The document then covers secure hash functions, public-key encryption, digital signatures, and key management before concluding with an example application of encrypting stored data.
This document discusses the implementation of a hybrid cryptography algorithm combining DES and IDEA. It begins by providing background on encryption, key escrow schemes, and the need for stronger algorithms. It then separately describes DES and IDEA, including their structure, performance analysis, and types of cryptanalysis attacks they are susceptible to. The document proposes a new hybrid algorithm combining DES and IDEA to improve security and integrity.
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
This document discusses security issues related to mobile technology. It begins by explaining the importance of understanding threats when building a security system. It then discusses different types of attacks like interception, modification, and interruption that can target both static and dynamic assets. The document also covers security concepts like confidentiality, integrity, authorization, and availability. It explains symmetric and asymmetric encryption techniques as well as protocols like SSL, TLS, and WTLS that use these techniques to securely transmit data over networks.
1. The document discusses the principles of symmetric encryption, including the use of a secret key, plaintext, ciphertext, encryption and decryption algorithms.
2. It describes the Feistel cipher structure, which uses rounds of processing and subkeys to encrypt plaintext blocks. Parameters like block size, key size, and number of rounds determine the security level.
3. The Data Encryption Standard (DES) algorithm is discussed as the most widely used conventional encryption scheme. It uses a 56-bit key to encrypt 64-bit blocks via initial permutation, multiple rounds of processing, and final permutation.
Encrypted Negative Password using for Authenticationijtsrd
This document proposes a new password authentication system that uses encrypted negative passwords (ENPs) for secure password storage and authentication. It involves hashing the password, converting it to a negative value, and encrypting it using strong algorithms like PBKDF2 and Blowfish. This makes the passwords more secure against attacks like dictionary attacks and lookup table attacks compared to existing systems. The proposed system includes a registration phase where the password is processed to generate the ENP, and an authentication phase where the ENP is validated upon login. Advantages of the system include stronger security, resistance to various attacks, and easy integration with existing authentication systems.
This document discusses the RSA network security approach. It begins with an introduction to RSA, describing how it uses large prime numbers and exponentiation to encrypt and decrypt messages. It also discusses how RSA can be used for both encryption and digital signatures to provide authentication. The document then covers symmetric and public key cryptography concepts before focusing more on the specifics of the RSA algorithm and its use for secure network communications.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Symmetric encryption uses the same key for both encryption and decryption. It has five components: plaintext, encryption algorithm, secret key, ciphertext, and decryption algorithm. The security depends on keeping the key secret. Symmetric encryption is classified by the type of operations used, number of keys, and how plaintext is processed. Common symmetric algorithms like DES and AES encrypt plaintext in blocks using a substitution-permutation network structure.
The document discusses cryptography concepts such as encryption algorithms, key management, digital signatures, and cryptanalysis attacks. It covers symmetric and asymmetric cryptographic systems as well as specific algorithms like DES, RSA, and elliptic curve cryptography. The document also examines requirements for secrecy, authenticity and properties of cryptographic systems.
This document provides an overview of encryption and authentication methods. It discusses symmetric key encryption where both computers share a secret key, and public key encryption which uses digital certificates from a certificate authority to allow secure communication without pre-shared keys. Popular implementations of public key encryption include SSL and TLS, which use certificates to verify identities and encrypt data, then employ symmetric encryption for efficiency. Hashing algorithms are also discussed, which create unique values from input data to serve as keys in an irreversible way, ensuring security.
Security+ Guide to Network Security Fundamentals, 3rd Edition, by Mark Ciampa
Knowledge and skills required for Network Administrators and Information Technology professionals to be aware of security vulnerabilities, to implement security measures, to analyze an existing network environment in consideration of known security threats or risks, to defend against attacks or viruses, and to ensure data privacy and integrity. Terminology and procedures for implementation and configuration of security, including access control, authorization, encryption, packet filters, firewalls, and Virtual Private Networks (VPNs).
CNIT 120: Network Security
http://samsclass.info/120/120_S09.shtml#lecture
Policy: http://samsclass.info/policy_use.htm
Many thanks to Sam Bowne for allowing to publish these presentations.
Cryptography is the process of encrypting and decrypting data to protect it from unauthorized access. The document discusses the history of cryptography from early substitution ciphers to modern algorithms like AES. It describes symmetric cryptography which uses a single key and asymmetric cryptography which uses public/private key pairs. Popular algorithms for encryption, digital signatures, and hashing are also outlined along with attacks that can compromise cryptosystems like brute force and man-in-the-middle attacks.
Comparative Analysis of Cryptographic Algorithms and Advanced Cryptographic A...editor1knowledgecuddle
Today is the era of Internet and networks applications. So,Information security is a challenging issue in today’s technological world. There is a demand for a stronger encryption which is very hard to crack. The role of Cryptography is most important in the field of network security. There is a broad range of cryptographic algorithms that are used for securing networks and presently continuous researches on the new cryptographic algorithms are going on for evolving more advanced techniques for secures
communication. In this study is made for the cryptography algorithms, particularly algorithms- AES, DES, RSA, Blowfishare compared and performance is evaluated. Also some enhanced algorithms are described and compared with the enhanced algorithms.
Keywords - AES, DES, BLOWFISH, Decryption, Encryption, Security
The document describes the history and types of cryptography. It discusses symmetric and asymmetric cryptography algorithms such as DES, AES, RSA, and Diffie-Hellman. It also covers cryptanalysis techniques like brute force attacks and digital signatures. Public key infrastructure (PKI) uses digital certificates to authenticate users, while protocols like PGP, S/MIME, and PEM can encrypt email messages.
This document provides instructions on how to hack passwords and create an FTP server on a PC. It discusses techniques like hashing, guessing, using default passwords, brute force attacks, and phishing to hack passwords. It also describes how to crack Windows passwords using tools like Cain and Abel. Additionally, it outlines the steps to obtain a static IP address, install and configure an FTP server software, and set up user accounts on the server.
This document provides an overview of key concepts in DNSSEC including public/private keys, message digests or hashes, and digital signatures. It explains that public/private key pairs are used, where the private key is kept secret and the public key can be freely distributed. It also describes how one-way hashing functions work to generate fixed-length hashes from variable-length data, and how digital signatures are created by encrypting a message hash with a private key. These three concepts of public/private keys, hashes, and digital signatures form the basis of cryptographic techniques used in DNSSEC.
Documenting Software Architectural Component and Connector with UML 2editor1knowledgecuddle
One of the major challenges facing consultants today is maintaining a level of knowledge of leading and emerging technologies, beyond the superficial or buzzword level. We need to develop a level of understanding that allows us to communicate effectively with both suppliers and customers.Digital signature scheme is a fundamental cryptographic tool which allows one to sign an electronic message and later the produced signature can be verified by the owner of the message. This paper presents a digital signature scheme and discusses the security aspects of proposed digital signature scheme. This paper provides a literature review and analysis of the security systems and the emphasis is on digital signature, hashed message algorithm. Keywords:Digital signature, Hashed message algorithm, MD5 Algorithm, Public key encryption, SHA2 Algorithm.
1) Password cracking is the process of recovering secret passwords through various techniques like hashing, guessing using dictionaries, using default passwords, brute force, and phishing.
2) Common password cracking techniques include exploiting weak hashing algorithms, guessing using common words and personal details, using default passwords for applications, trying all possible character combinations through brute force, and tricking users into revealing passwords through phishing.
3) IP spoofing involves modifying the source IP address field in the IP packet header to disguise the identity of the sender or impersonate another system and exploit weaknesses in the connection-oriented TCP protocol.
This document provides an overview of cryptographic algorithms and their uses. It begins with symmetric encryption, which uses a single secret key to encrypt and decrypt data, providing confidentiality. The most common symmetric algorithms are the Data Encryption Standard (DES) and the Advanced Encryption Standard (AES), which are block ciphers that encrypt data in fixed-size blocks. It also discusses stream ciphers, which encrypt data one element at a time. The document then covers secure hash functions, public-key encryption, digital signatures, and key management before concluding with an example application of encrypting stored data.
This document discusses the implementation of a hybrid cryptography algorithm combining DES and IDEA. It begins by providing background on encryption, key escrow schemes, and the need for stronger algorithms. It then separately describes DES and IDEA, including their structure, performance analysis, and types of cryptanalysis attacks they are susceptible to. The document proposes a new hybrid algorithm combining DES and IDEA to improve security and integrity.
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
This document discusses security issues related to mobile technology. It begins by explaining the importance of understanding threats when building a security system. It then discusses different types of attacks like interception, modification, and interruption that can target both static and dynamic assets. The document also covers security concepts like confidentiality, integrity, authorization, and availability. It explains symmetric and asymmetric encryption techniques as well as protocols like SSL, TLS, and WTLS that use these techniques to securely transmit data over networks.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELgerogepatton
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECTjpsjournal1
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
Literature Review Basics and Understanding Reference Management.pptxDr Ramhari Poudyal
Three-day training on academic research focuses on analytical tools at United Technical College, supported by the University Grant Commission, Nepal. 24-26 May 2024
KuberTENes Birthday Bash Guadalajara - K8sGPT first impressionsVictor Morales
K8sGPT is a tool that analyzes and diagnoses Kubernetes clusters. This presentation was used to share the requirements and dependencies to deploy K8sGPT in a local environment.
International Conference on NLP, Artificial Intelligence, Machine Learning an...gerogepatton
International Conference on NLP, Artificial Intelligence, Machine Learning and Applications (NLAIM 2024) offers a premier global platform for exchanging insights and findings in the theory, methodology, and applications of NLP, Artificial Intelligence, Machine Learning, and their applications. The conference seeks substantial contributions across all key domains of NLP, Artificial Intelligence, Machine Learning, and their practical applications, aiming to foster both theoretical advancements and real-world implementations. With a focus on facilitating collaboration between researchers and practitioners from academia and industry, the conference serves as a nexus for sharing the latest developments in the field.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Low power architecture of logic gates using adiabatic techniquesnooriasukmaningtyas
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
2. Flashback
IS deals with CIA
Intro to Cryptography – Terminologies
Symmetric / Asymmetric Cryptography
Malicious Programs
We often say a term brute force attack. So what it
actually is?
2
3. Enigma
3
The Enigma machine was invented by the
German engineer Arthur Scherbius at the end of
World War I
Enigma has an electromechanical rotor
mechanism that scrambles the 26 letters of the
alphabet.
4. Enigma
4
In typical use, one person enters text on the Enigma's keyboard and
another person writes down which of 26 lights above the keyboard lights
up at each key press. If plain text is entered, the lit-up letters are the
encoded ciphertext. Entering ciphertext transforms it back into readable
plaintext.
The rotor mechanism changes the electrical connections between the
keys and the lights with each keypress.
The security of the system depends on a set of machine settings that
were generally changed daily during the war, based on secret key lists
distributed in advance, and on other settings that were changed for each
message.
5. Enigma
5
The receiving station has to know and use the exact settings
employed by the transmitting station to successfully decrypt
a message.
While Germany introduced a series of improvements to
Enigma over the years, and these hampered decryption
efforts to varying degrees, they did not ultimately prevent
Britain and its allies from exploiting Enigma-encoded
messages as a major source of intelligence during the war.
7. Signatures: A Malware Countermeasure
Scan compare the analyzed object with a database of
signatures
A signature is a virus fingerprint
– E.g.,a string with a sequence of instructions specific
for each virus
– Different from a digital signature
A file is infected if there is a signature inside its code
– Fast pattern matching techniques to search for
signatures
All the signatures together create the malware database
that usually is proprietary
7
8. White/Black Listing
Maintain database of cryptographic hashes for
– Operating system files
– Popular applications
– Known infected files
Compute hash of each file in hard drives
Look up into database to compare
Needs to protect the integrity of the database
Example: TripWire software
8
9. Heuristic Analysis
Useful to identify new and “zero day” malware
Code analysis
– Based on the instructions, the antivirus can determine
whether or not the program is malicious, i.e., program
contains instruction to delete system files,
Execution emulation
– Run code in isolated emulation environment
• Such as in Virtual Machine
– Monitor actions that target file takes
– If the actions are harmful, mark as virus
Heuristic methods can trigger false alarms
9
10. Shield vs. On-demand
Shield
– Background process
(service/daemon)
– Scans each time a file
is touched (open, copy,
execute, etc.)
On-demand
• Scan on explicit user
request or according to
regular schedule
• On a suspicious file,
directory, drive, etc.
10
11. Online vs Offline Anti Virus Software
Online
Free browser plug-in
Authentication through third
party certificate (i.e. VeriSign)
No shielding
Software and signatures
update at each scan
Poorly configurable
Scan needs internet
connection
Report collected by the
company that offers the
service
Offline
Paid annual subscription
Installed on the OS
Software distributed securely by
the vendor online or a retailer
System shielding
Scheduled software and signatures
updates
Easily configurable
Scan without internet connection
Report collected locally and may
be sent to vendor
11
12. Quarantine
A suspicious file can be isolated in a folder called
quarantine:
– E.g,. if the result of the heuristic analysis is positive and you are
waiting for db signatures update
The suspicious file is not deleted but made harmless: the
user can decide when to remove it or eventually restore for
a false positive
– Interacting with a file in quarantine it is possible only through the
antivirus program
The file in quarantine is harmless because it is encrypted
Usually the quarantine technique is proprietary and the
details are kept secret
12
13. Static vs. Dynamic Analysis
Static Analysis
Checks the code without
trying to execute it
Quick scan in white list
Filtering: scan with different
antivirus and check if they
return same result with
different name
Weeding: remove the correct
part of files as junk to better
identify the virus
Code analysis: check binary
code to understand if it is an
executable, e.g., PE
Disassembling: check if the
byte code shows something
unusual
Dynamic Analysis
Check the execution of
codes inside a virtual
sandbox
Monitor
– File changes
– Registry changes
– Processes and threads
– Networks ports
13
16. Symmetric Key Cryptography - Examples
16
Data Encryption Standard (DES)
The Data Encryption Standard was published in 1977 by the US National
Bureau of Standards.
It uses 56 bit key and maps a 64 bit input block of plaintext onto a 64 bit
block of ciphertext. 56 bits is a rather small key for today's computing power.
17. Problems with Conventional Cryptography
17
Key Management
Symmetric-key systems are simpler and faster; their main drawback is
that the two parties must somehow exchange the key in a secure way
and keep it secure after that.
Key Management caused nightmare for the parties using the symmetric key
cryptography. They were worried about how to get the keys safely and securely
across to all users. This gave the chance for third parties to intercept the keys
in transit to decode the top-secret messages. Thus, if the key was
compromised, the entire coding system was compromised and a “Secret”
would no longer remain a “Secret”.
This is why the “Public Key Cryptography” came into existence.
18. Asymmetric Key Cryptography
18
Asymmetric cryptography , also known as Public-key cryptography, refers
to a cryptographic algorithm which requires two separate keys, one of
which is private and one of which is public. The public key is used to
encrypt the message and the private one is used to decrypt the message.
19. Asymmetric Key Cryptography
19
Public Key Cryptography is a very advanced form of cryptography.
Officially, it was invented by Whitfield Diffie and Martin Hellman in 1975.
The basic technique of public key cryptography was first discovered in 1973
by the British Clifford Cocks of Communications-Electronics Security Group
(CESG) of (Government Communications Headquarters - GCHQ) but this
was a secret until 1997.
21. Hash Functions
21
A cryptographic hash function is a function that takes an arbitrary block of
data and returns a fixed-size bit string, the cryptographic hash value, such
that any (accidental or intentional) change to the data will (with very high
probability) change the hash value.
The data to be encoded are often called
the message, and the hash value is
sometimes called the message digest or
simply digest.
22. Hash Functions
22
An ideal cryptographic hash function has four main properties:
it is deterministic, same message always results in the same hash
it is easy to compute the hash value for any given message
it is infeasible to generate a message that has a given hash
it is infeasible to modify a message without changing the hash
it is infeasible to find two different messages with the same hash.
23. Hash Functions
23
Collusion Discovery
In March 2005 Xiaoyun Wang and Hongbo Yu of Shandong University in
China created a pair of files that share the same MD5 checksum hence
prove that there is a collusion when using MD5
$ md5sum file1.dat
MD5 Sum = a4c0d35c95a63a805915367dcfe6b751
$ md5sum file2.dat
MD5 Sum = a4c0d35c95a63a805915367dcfe6b751
Visit the following websites for more information
http://www.mscs.dal.ca/~selinger/md5collision/
http://www.x-ways.net/md5collision.html
24. Block vs Stream Ciphers
Block ciphers process messages in blocks, each
of which is then en/decrypted
Like a substitution on very big characters
– 64-bits or more
Stream ciphers process messages a bit or byte
at a time when en/decrypting
Many current ciphers are block ciphers
– better analyzed
– broader range of applications
26. Block Cipher Principles
Most symmetric block ciphers are based on a Feistel
Cipher Structure
Must be able to decrypt ciphertext to recover messages
efficiently
Block ciphers look like an extremely large substitution
264 entries for a 64-bit block
instead create from smaller building blocks
using idea of a product cipher
27. Claude Shannon and Substitution – Permutation Ciphers
Claude Shannon introduced idea of substitution-permutation (S-P)
networks in 1949 paper
form basis of modern block ciphers
S-P networks are based on the two primitive cryptographic
operations:
substitution (S-box)
permutation (P-box)
provide confusion & diffusion of message & key
28. Confusion and Diffusion
cipher needs to completely obscure statistical properties
of original message
a one-time pad does this
more practically Shannon suggested combining S & P
elements to obtain:
diffusion – dissipates statistical structure of plaintext over
bulk of ciphertext
confusion – makes relationship between ciphertext and
key as complex as possible
29. Feistel Cipher Structure
Horst Feistel devised the feistel cipher
– based on concept of invertible product cipher
partitions input block into two halves
– process through multiple rounds which
perform a substitution on left data half
based on round function of right half & subkey
then have permutation swapping halves
implements Shannon’s S-P net concept
32. Feistel Cipher Design Elements
block size
key size
number of rounds
subkey generation algorithm
round function
fast software en/decryption
ease of analysis
34. Data Encryption Standard (DES)
most widely used block cipher in world till it
became obsolete
adopted in 1977 by NBS (now NIST)
– as FIPS PUB 46
encrypts 64-bit data using 56-bit key
has widespread use
has been considerable controversy over its
security
35. DES History
IBM developed Lucifer cipher
– by team led by Feistel in late 60’s
– used 64-bit data blocks with 128-bit key
then redeveloped as a commercial cipher with input from
NSA and others
in 1973 NBS issued request for proposals for a national
cipher standard
IBM submitted their revised Lucifer which was eventually
accepted as the DES
36. DES Design Controversy
although DES standard is public
was considerable controversy over design
– in choice of 56-bit key (vs Lucifer 128-bit)
– and because design criteria were classified
subsequent events and public analysis show in fact
design was appropriate
use of DES had flourished
– especially in financial applications
– still standardised for legacy application use
37. DES Round Structure
uses two 32-bit L & R halves
as for any Feistel cipher can describe as:
Li = Ri–1
Ri = Li–1 F(Ri–1, Ki)
F takes 32-bit R half and 48-bit subkey:
– expands R to 48-bits using permutation
– adds to subkey using XOR
– passes through 8 S-boxes to get 32-bit result
– finally permutes using 32-bit permutation
42. Substitution Boxes S
have eight S-boxes which map 6 to 4 bits
each S-box is actually 4 little 4 bit boxes
outer bits 1 & 6 (row bits) select one row of 4
inner bits 2-5 (col bits) are substituted
result is 8 lots of 4 bits, or 32 bits
row selection depends on both data & key
feature known as autoclaving (autokeying)
43. DES Key Schedule
forms subkeys used in each round
initial permutation of the key (PC1) which selects 56-
bits in two 28-bit halves
16 stages consisting of:
• rotating each half separately either 1 or 2 places
depending on the key rotation schedule K
• selecting 24-bits from each half & permuting them by to
use in round function F
44. DES Decryption
decrypt must unwind steps of data computation
with Feistel design, do encryption steps again
using subkeys in reverse order (SK16 … SK1)
– IP undoes final FP step of encryption
– 1st round with SK16 undoes 16th encrypt round
– ….
– 16th round with SK1 undoes 1st encrypt round
– then final FP undoes initial encryption IP
– thus recovering original data value
46. Avalanche Effect
46
• key desirable property of any encryption algorithm
• want a change of one input or key bit to result in changing
approx half output bits
• making attempts to “home-in” by guessing keys impossible
• DES exhibits strong avalanche
47. Strength of DES
47
•56-bit keys have 256 = 7.2 x 1016 values
•brute force search looks hard
•past advances have shown it is possible
–in 1997 on Internet in a few months
–in 1998 on dedicated h/w (EFF) in a few days
–in 1999 above combined in 22hrs!
–Nowadays … can do it on a desktop!
•still, it must be possible to recognize plaintext
•forced consideration of alternatives to DES
48. Attacks on DES – Timing Attack
48
•attacks actual implementation of cipher
•use knowledge of consequences of implementation to
derive information about some/all subkey bits
•specifically use fact that calculations can take varying
times depending on the value of the inputs to it
•particularly problematic on smartcards
49. Attacks on DES – Analytic Attacks
49
• now have several analytic attacks on DES
• these utilise some deep structure of the cipher
–by gathering information about encryptions
–can eventually recover some/all of the sub-key bits
–if necessary then exhaustively search for the rest
• generally these are statistical attacks
–differential cryptanalysis
–linear cryptanalysis
–related key attacks
50. Attacks on DES – Analytic Attacks
50
Differential Cryptanalysis
• one of the most significant (public) advances in
cryptanalysis
• known by NSA in 70's … influenced DES
• Murphy, Biham & Shamir published in 90’s
• powerful method to analyse block ciphers
• used to analyse most current block ciphers with varying
degrees of success
• DES reasonably resistant to it.
51. Attacks on DES – Analytic Attacks
51
Linear Cryptanalysis
• another recent development
• also a statistical method
• must be iterated over rounds, with decreasing probabilities
• developed by Matsui et al in early 90's
• based on finding linear approximations
• can attack DES with 243 known plaintexts
• easier but still in practise infeasible
52. DES Design Criteria
52
•as reported by Coppersmith in 1994
•7 criteria for S-boxes provide for
–non-linearity
–resistance to differential cryptanalysis
–good confusion
•3 criteria for permutation P provide for
–increased diffusion
53. Block Cipher Design
53
Many principles from Feistel in 70s still hold
• number of rounds
–more is better, make exhaustive search the best attack
option
• function f:
–provides “confusion”, is nonlinear, avalanche
–issues of how S-boxes are selected
• key schedule
–complex subkey creation, key avalanche