Secure communication is when two entities are communicating and do not want a third party to listen in. For that, they need to communicate in a way not susceptible to eavesdropping or interception. Secure communication includes means by which people can share information with varying degrees of certainty that third parties cannot intercept what was said. Other than spoken face-to-face communication with no possible eavesdropper, it is probably safe to say that no communication is guaranteed secure in this sense, although practical obstacles such as legislation, resources, technical issues (interception and encryption), and the sheer volume of communication serve to limit surveillance.
This document discusses secure communication in network systems. It defines network security as activities that protect a network's usability, reliability, integrity and safety. Secure communication ensures confidentiality by encrypting messages so only the recipient can understand them, authentication to verify identities, and message integrity to ensure messages are not altered. It discusses how authentication can be based on what users know (passwords), have (tokens, cards) or are (biometrics). MACs (message authentication codes) using hash functions with a secret key also ensure message integrity and non-repudiation. The document outlines some principles of implementing network security like layering, limiting access, obscurity and simplicity.
Encryption is the process of encoding messages or information so that only authorized parties can read it. There are two main types of encryption: symmetric key encryption which uses the same key to encrypt and decrypt, and asymmetric key encryption which uses a public key to encrypt and a private key to decrypt. While symmetric encryption is faster, asymmetric encryption is more secure since it does not require sharing the same key. Encryption is widely used to provide authentication, privacy, integrity, and accountability of data.
Authentication(pswrd,token,certificate,biometric)Ali Raw
Authentication refers to confirming the identity of a person or entity. There are three main categories of authentication: what you know (e.g. passwords), what you have (e.g. tokens, certificates), and who you are (biometrics). Common types of authentication include password-based using user IDs and passwords, certificate-based using digital certificates, token-based using devices that generate random codes, and biometric-based using unique human characteristics like fingerprints. Each type involves validating identity by verifying identifying information against stored credentials through an authentication process.
This document discusses types of attacks on computer and network security. It defines passive and active attacks. Passive attacks monitor systems without interaction and include interception and traffic analysis attacks. Interception involves unauthorized access to messages. Traffic analysis examines communication patterns. Active attacks make unauthorized changes and include masquerade, interruption, fabrication, session replay, modification, and denial of service attacks. Masquerade involves assuming another user's identity. Interruption obstructs communication. Fabrication inserts fake messages. Session replay steals login information. Modification alters packet addresses or data. Denial of service deprives access by overwhelming the target.
Slides for my lecture "Software security: vulnerabilities, exploits and
possible countermeasures" I had been giving for Samsung Electronics in Suwon, Korea (South).
This document discusses secure communication in network systems. It defines network security as activities that protect a network's usability, reliability, integrity and safety. Secure communication ensures confidentiality by encrypting messages so only the recipient can understand them, authentication to verify identities, and message integrity to ensure messages are not altered. It discusses how authentication can be based on what users know (passwords), have (tokens, cards) or are (biometrics). MACs (message authentication codes) using hash functions with a secret key also ensure message integrity and non-repudiation. The document outlines some principles of implementing network security like layering, limiting access, obscurity and simplicity.
Encryption is the process of encoding messages or information so that only authorized parties can read it. There are two main types of encryption: symmetric key encryption which uses the same key to encrypt and decrypt, and asymmetric key encryption which uses a public key to encrypt and a private key to decrypt. While symmetric encryption is faster, asymmetric encryption is more secure since it does not require sharing the same key. Encryption is widely used to provide authentication, privacy, integrity, and accountability of data.
Authentication(pswrd,token,certificate,biometric)Ali Raw
Authentication refers to confirming the identity of a person or entity. There are three main categories of authentication: what you know (e.g. passwords), what you have (e.g. tokens, certificates), and who you are (biometrics). Common types of authentication include password-based using user IDs and passwords, certificate-based using digital certificates, token-based using devices that generate random codes, and biometric-based using unique human characteristics like fingerprints. Each type involves validating identity by verifying identifying information against stored credentials through an authentication process.
This document discusses types of attacks on computer and network security. It defines passive and active attacks. Passive attacks monitor systems without interaction and include interception and traffic analysis attacks. Interception involves unauthorized access to messages. Traffic analysis examines communication patterns. Active attacks make unauthorized changes and include masquerade, interruption, fabrication, session replay, modification, and denial of service attacks. Masquerade involves assuming another user's identity. Interruption obstructs communication. Fabrication inserts fake messages. Session replay steals login information. Modification alters packet addresses or data. Denial of service deprives access by overwhelming the target.
Slides for my lecture "Software security: vulnerabilities, exploits and
possible countermeasures" I had been giving for Samsung Electronics in Suwon, Korea (South).
This document discusses symmetric-key algorithms and provides details on stream ciphers and block ciphers. Symmetric-key algorithms use the same key for encryption and decryption. Stream ciphers encrypt bits or characters one at a time using a pseudorandom generator, while block ciphers encrypt fixed-length blocks of bits at once. The document also notes that symmetric-key encryption requires both parties to share a secret key, unlike public-key encryption.
The presentation describes basics of cryptography and information security. It covers goals of cryptography, history of cipher symmetric and public key cryptography
This document discusses steganography, which is hiding messages within seemingly harmless carriers or covers so that no one apart from the intended recipient knows a message has been sent. It provides examples of steganography in text, images, and audio, as well as methods used for each. These include techniques like least significant bit insertion and temporal sampling rates. The document also covers steganalysis, which aims to detect hidden communications by analyzing changes in the statistical properties of covers.
Cryptography is the art and science of securing communication and information by encoding messages so that they are unintelligible to unauthorized parties. It involves techniques for encrypting and decrypting messages to ensure confidentiality, authentication, and integrity. The document defines key terminology related to cryptography such as encryption, decryption, plaintext, ciphertext, and cryptanalysis. It also discusses different types of cryptographic techniques including symmetric and asymmetric encryption as well as cryptographic applications and characteristics.
This PPT explains about the term "Cryptography - Encryption & Decryption". This PPT is for beginners and for intermediate developers who want to learn about Cryptography. I have also explained about the various classes which .Net provides for encryption and decryption and some other terms like "AES" and "DES".
The document discusses Secure Electronic Transaction (SET), which is a protocol that aims to secure credit card transactions on the internet. It consists of a set of protocols to provide confidentiality, integrity, authentication, and non-repudiation. SET uses public key cryptography including digital signatures and certificates to authenticate parties and encrypt transaction information. The key steps in a SET transaction involve the customer sending encrypted order and payment information to the merchant, who then requests payment authorization from the payment gateway before fulfilling the order.
This document discusses message authentication techniques including message encryption, message authentication codes (MACs), and hash functions. It describes how each technique can be used to authenticate messages and protect against various security threats. It also covers how symmetric and asymmetric encryption can provide authentication when used with MACs or digital signatures. Specific MAC and hash functions are examined like HMAC, SHA-1, and SHA-2. X.509 is introduced as a standard for digital certificates.
Presentation on Investigating Emails to detect their spam free nature. Emails are a way to harm others or a social engineering way to fulfill wrong motives by some people. Awareness about the Forensics behind Email will give people an edge to protect themselves from fraud crimes.
User Authentication: Passwords and BeyondJim Fenton
The document discusses user authentication beyond passwords. It provides guidance on emphasizing usability, having realistic security expectations, and burdening systems rather than users. It also covers password threats like online guessing, offline attacks, and side channels. It recommends techniques like throttling logins, prohibiting common passwords, using long passphrases, allowing diverse characters, and avoiding hints, expiration, and composition rules.
This document provides an introduction to encryption. It defines encryption as the process of converting data into an unrecognizable form. Encryption is important for achieving data security and privacy. It allows users to securely protect passwords, personal data, and ensure files have not been altered. Examples of encryption applications include web browsing, email, and hard drive encryption. The document then describes how encryption works by encrypting a message using an encryption key. It also outlines different encryption methods like hashing, symmetric, and asymmetric encryption.
This document discusses network security and cryptography. It begins by defining a network and common network threats. It then discusses network security, including transit and traffic security. It covers problems and attacks like secrecy, authentication, and integrity control. The document introduces cryptography and its use in encryption and decryption to securely transmit data. It describes algorithms like RSA, substitution ciphers, and transposition ciphers. It also covers advantages and disadvantages of cryptography along with a proposed concept to strengthen encryption security.
This slide explains the design part as well as implementation part of the firewall. And also tells about the need of firewall and firewall capabilities.
The document provides an overview of digital signatures, including their history, theory, workings, and importance. Digital signatures were first proposed in 1976 and use public key cryptography to validate the authenticity and integrity of electronic documents and messages. They work by encrypting a hash of the message with the sender's private key, which can later be decrypted and verified by the recipient using the sender's public key. This allows the recipient to confirm the message has not been tampered with and was signed by the proper sender. Digital signatures provide security benefits like non-repudiation and are legally recognized in many countries and applications.
It is an IETF standardization initiative whose goal is to come out with an Internet standard Version of SSL. The presentation discusses all. Happy Learning. :)
Cryptography is the science of using mathematics to encrypt and decrypt data.
Cryptography enables you to store sensitive information or transmit it across insecure networks so that it cannot be read by anyone except the intended recipient.
The presentation covers the following:
Basic Terms
Cryptography
The General Goals of Cryptography
Common Types of Attacks
Substitution Ciphers
Transposition Cipher
Steganography- “Concealed Writing”
Symmetric Secret Key Encryption
Types of Symmetric Algorithms
Common Symmetric Algorithms
Asymmetric Secret Key Encryption
Common Asymmetric Algorithms
Public Key Cryptography
Hashing Techniques
Hashing Algorithms
Digital Signatures
Transport Layer Security
Public key infrastructure (PKI)
This document discusses different types of cyber attacks including passive attacks like eavesdropping and masquerading, active attacks like denial of service, and methods attackers use like spoofing, backdoors, brute force attacks, and dictionary attacks. It provides details on how each attack compromises security through unauthorized access, modification of data, denial of service, or repudiation.
Digital watermarking involves hiding digital information in carrier signals like audio, video, and images. Watermarks can be used to verify authenticity and identify copyright owners. They are mostly invisible but can be detected using algorithms. Various techniques are used for different purposes like copyright protection, source tracking, and tamper detection. Watermarking provides passive protection by marking data without degrading it or controlling access.
Confidential Log-In To Real User using Visual Cryptography and Upload Encrypt...IRJET Journal
This document presents a proposed system for confidential login and encrypted data storage using visual cryptography and steganography. The key aspects are:
1. A visual cryptography scheme is used to generate image CAPTCHAs for user login verification, aiming to prevent phishing attacks.
2. A steganography technique embeds encrypted user data into video files by breaking the data into chunks and hiding chunks in the least significant bits of different video frames, making the hidden data imperceptible.
3. Algorithms like scene change detection, split algorithm, and least significant bit are utilized in the steganography process.
The proposed system aims to provide stronger security and privacy for user login and data storage compared to
This document discusses symmetric-key algorithms and provides details on stream ciphers and block ciphers. Symmetric-key algorithms use the same key for encryption and decryption. Stream ciphers encrypt bits or characters one at a time using a pseudorandom generator, while block ciphers encrypt fixed-length blocks of bits at once. The document also notes that symmetric-key encryption requires both parties to share a secret key, unlike public-key encryption.
The presentation describes basics of cryptography and information security. It covers goals of cryptography, history of cipher symmetric and public key cryptography
This document discusses steganography, which is hiding messages within seemingly harmless carriers or covers so that no one apart from the intended recipient knows a message has been sent. It provides examples of steganography in text, images, and audio, as well as methods used for each. These include techniques like least significant bit insertion and temporal sampling rates. The document also covers steganalysis, which aims to detect hidden communications by analyzing changes in the statistical properties of covers.
Cryptography is the art and science of securing communication and information by encoding messages so that they are unintelligible to unauthorized parties. It involves techniques for encrypting and decrypting messages to ensure confidentiality, authentication, and integrity. The document defines key terminology related to cryptography such as encryption, decryption, plaintext, ciphertext, and cryptanalysis. It also discusses different types of cryptographic techniques including symmetric and asymmetric encryption as well as cryptographic applications and characteristics.
This PPT explains about the term "Cryptography - Encryption & Decryption". This PPT is for beginners and for intermediate developers who want to learn about Cryptography. I have also explained about the various classes which .Net provides for encryption and decryption and some other terms like "AES" and "DES".
The document discusses Secure Electronic Transaction (SET), which is a protocol that aims to secure credit card transactions on the internet. It consists of a set of protocols to provide confidentiality, integrity, authentication, and non-repudiation. SET uses public key cryptography including digital signatures and certificates to authenticate parties and encrypt transaction information. The key steps in a SET transaction involve the customer sending encrypted order and payment information to the merchant, who then requests payment authorization from the payment gateway before fulfilling the order.
This document discusses message authentication techniques including message encryption, message authentication codes (MACs), and hash functions. It describes how each technique can be used to authenticate messages and protect against various security threats. It also covers how symmetric and asymmetric encryption can provide authentication when used with MACs or digital signatures. Specific MAC and hash functions are examined like HMAC, SHA-1, and SHA-2. X.509 is introduced as a standard for digital certificates.
Presentation on Investigating Emails to detect their spam free nature. Emails are a way to harm others or a social engineering way to fulfill wrong motives by some people. Awareness about the Forensics behind Email will give people an edge to protect themselves from fraud crimes.
User Authentication: Passwords and BeyondJim Fenton
The document discusses user authentication beyond passwords. It provides guidance on emphasizing usability, having realistic security expectations, and burdening systems rather than users. It also covers password threats like online guessing, offline attacks, and side channels. It recommends techniques like throttling logins, prohibiting common passwords, using long passphrases, allowing diverse characters, and avoiding hints, expiration, and composition rules.
This document provides an introduction to encryption. It defines encryption as the process of converting data into an unrecognizable form. Encryption is important for achieving data security and privacy. It allows users to securely protect passwords, personal data, and ensure files have not been altered. Examples of encryption applications include web browsing, email, and hard drive encryption. The document then describes how encryption works by encrypting a message using an encryption key. It also outlines different encryption methods like hashing, symmetric, and asymmetric encryption.
This document discusses network security and cryptography. It begins by defining a network and common network threats. It then discusses network security, including transit and traffic security. It covers problems and attacks like secrecy, authentication, and integrity control. The document introduces cryptography and its use in encryption and decryption to securely transmit data. It describes algorithms like RSA, substitution ciphers, and transposition ciphers. It also covers advantages and disadvantages of cryptography along with a proposed concept to strengthen encryption security.
This slide explains the design part as well as implementation part of the firewall. And also tells about the need of firewall and firewall capabilities.
The document provides an overview of digital signatures, including their history, theory, workings, and importance. Digital signatures were first proposed in 1976 and use public key cryptography to validate the authenticity and integrity of electronic documents and messages. They work by encrypting a hash of the message with the sender's private key, which can later be decrypted and verified by the recipient using the sender's public key. This allows the recipient to confirm the message has not been tampered with and was signed by the proper sender. Digital signatures provide security benefits like non-repudiation and are legally recognized in many countries and applications.
It is an IETF standardization initiative whose goal is to come out with an Internet standard Version of SSL. The presentation discusses all. Happy Learning. :)
Cryptography is the science of using mathematics to encrypt and decrypt data.
Cryptography enables you to store sensitive information or transmit it across insecure networks so that it cannot be read by anyone except the intended recipient.
The presentation covers the following:
Basic Terms
Cryptography
The General Goals of Cryptography
Common Types of Attacks
Substitution Ciphers
Transposition Cipher
Steganography- “Concealed Writing”
Symmetric Secret Key Encryption
Types of Symmetric Algorithms
Common Symmetric Algorithms
Asymmetric Secret Key Encryption
Common Asymmetric Algorithms
Public Key Cryptography
Hashing Techniques
Hashing Algorithms
Digital Signatures
Transport Layer Security
Public key infrastructure (PKI)
This document discusses different types of cyber attacks including passive attacks like eavesdropping and masquerading, active attacks like denial of service, and methods attackers use like spoofing, backdoors, brute force attacks, and dictionary attacks. It provides details on how each attack compromises security through unauthorized access, modification of data, denial of service, or repudiation.
Digital watermarking involves hiding digital information in carrier signals like audio, video, and images. Watermarks can be used to verify authenticity and identify copyright owners. They are mostly invisible but can be detected using algorithms. Various techniques are used for different purposes like copyright protection, source tracking, and tamper detection. Watermarking provides passive protection by marking data without degrading it or controlling access.
Confidential Log-In To Real User using Visual Cryptography and Upload Encrypt...IRJET Journal
This document presents a proposed system for confidential login and encrypted data storage using visual cryptography and steganography. The key aspects are:
1. A visual cryptography scheme is used to generate image CAPTCHAs for user login verification, aiming to prevent phishing attacks.
2. A steganography technique embeds encrypted user data into video files by breaking the data into chunks and hiding chunks in the least significant bits of different video frames, making the hidden data imperceptible.
3. Algorithms like scene change detection, split algorithm, and least significant bit are utilized in the steganography process.
The proposed system aims to provide stronger security and privacy for user login and data storage compared to
This document discusses a new approach to providing secure data transmission that combines digital watermarking and image compression techniques. Digital watermarking involves embedding hidden information in multimedia content like images, audio or video. The proposed approach uses discrete cosine transform (DCT) based watermarking combined with an improved adaptive Huffman encoding image compression algorithm. This combined technique aims to enhance security for data transmission while reducing storage space requirements compared to other compression methods.
This document discusses a proposed technique for secure data transmission that combines digital image watermarking and image compression. It begins with background information on digital watermarking, including its classifications, requirements, general system, and techniques such as spatial domain and frequency domain methods. It then provides an overview of image compression, including its benefits, techniques such as lossless and lossy compression, and common compression methods. The proposed technique embeds a watermark into an image using discrete cosine transform (DCT) based watermarking in the frequency domain. It then applies lossy image compression to the watermarked image using an improved adaptive Huffman coding algorithm. The goal is to achieve higher security for data transmission by combining these two techniques compared to
This document discusses privacy protection issues in cloud computing. It begins by defining cloud computing and privacy protection. The main privacy issues in cloud computing are lack of physical control over data, difficulty tracking and protecting all copies of data, and legal problems due to varying privacy laws across regions. The document proposes using a privacy manager software to help users obfuscate sensitive metadata attributes before sharing data in the cloud. This allows users to set preferences and personae to control how their personal data is handled and used by cloud services.
1) The document proposes using spread spectrum image steganography (SSIS) to securely store data in the cloud by hiding data within digital images. SSIS spreads a message across a digital image as low-power noise to make the hidden data imperceptible.
2) When a user uploads data to the cloud, SSIS software would encrypt the data multiple times within an image. Even if hackers access the encrypted image, they cannot decrypt the data without knowing how many times the user encrypted it.
3) This provides double security by encrypting data within an image format and ensuring hackers cannot decrypt without the encryption key information known only to the authorized user.
Iaetsd eliminating hidden data from an imageIaetsd Iaetsd
The document proposes a method for blindly extracting hidden data from digital media using multi-carrier iterative generalized least squares (M-IGLS). Data is hidden in the digital media through multi-carrier spread spectrum embedding and DCT transformation. M-IGLS extraction algorithm is then used to extract the hidden data without needing to know the original host or embedding carriers. Experimental results show the extracted data matches the hidden data and M-IGLS provides high signal to noise ratio for blind extraction. The technique aims to provide robust data hiding and extraction to protect against increasing data tracking and tampering attacks.
The document provides an introduction to stenography, which is the ancient art of hiding messages so they are not detectable. It discusses how stenography aims to hide the existence of a message, while cryptography scrambles it so it cannot be understood. It then reviews traditional stenography methods used before digital means, and outlines some key terms like cover image and stego image. The document proposes an edge adaptive scheme for digital image stenography and discusses advantages like messages not attracting attention. It also reviews some applications of stenography like digital watermarking and discusses the technique's future scope.
APPLICATION OF DATA HIDING IN AUDIO-VIDEO USING ANTIN FORENSICS TECHNIQUE FOR...ijiert bestjournal
The document discusses applying data hiding in audio-video files using anti-forensics techniques for authentication and data security. It proposes using steganography, which is hiding secret information in carrier files like audio and video, combined with anti-forensics techniques. The system would hide encrypted data in the least significant bits of frames in audio-video files. Parameters like PSNR and histograms would be analyzed at the transmitter and receiver ends to authenticate the data and ensure security. Common steganography algorithms like LSB and AES encryption would be used. The system aims to provide a more secure way of transferring data between client and server compared to traditional passwords or encryption alone.
A Review on Robust Digital Watermarking based on different Methods and its Ap...IJSRD
Digital Watermarking is the process of embedding data called watermark or signature or label or tag into a multimedia object (image or audio or video) so that the watermark can be extracted for ownership verification or authentication. A visible watermark is a secondary translucent image overlaid into the primary image and appears visible to a viewer on a careful inspection. The invisible watermark is embedded in such a way that the modification made to the pixel value is perceptually not noticed and it can be recovered only with an appropriate decoding mechanism. Digital watermarking is used to hide the information inside a signal, which cannot be easily extracted by the third party. Its widely used application is copyright protection of digital information. It is different from the encryption in the sense that it allows the user to access, view and interpret the signal but protect the ownership of the content. One of the current research areas is to protect digital watermark inside the information so that ownership of the information cannot be claimed by third party.
This document discusses message transfer using steganography. Steganography is used to hide information like text, images or videos within other media files such as images, videos or music. The document discusses how steganography can be used to securely transfer messages between two parties by hiding the messages within digital files like images without the server being able to decrypt the messages. It discusses how the least significant bits of pixels can be modified to embed secret data without significantly affecting the cover image. Different encryption techniques for embedding the data are also discussed. The document concludes that steganography can help protect messages not only from intruders but also from server-side attacks by making it difficult for the server to detect and decrypt embedded messages.
Homomorphic Encryption: Unveiling secrets without exposing themMuhammedYaseen39
Homomorphic encryption is a cryptographic technique that allows computations to be performed on encrypted data without decrypting it first. It allows a recipient who holds the private key to perform operations on encrypted data and obtain an encrypted result that matches the result of performing the same operations on the plaintext. The key types include partially homomorphic (supports addition or multiplication but not both), somewhat homomorphic (supports a limited number of addition or multiplication operations), and fully homomorphic (supports unlimited addition and multiplication operations). Homomorphic encryption has applications in secure cloud computing, privacy-preserving data analytics, and machine learning. It provides confidentiality during data processing while traditional encryption requires decryption before computations.
This document compares watermarking and cryptography. It discusses that watermarking involves hiding secret information in digital images while cryptography transforms information into an unreadable format. Watermarking provides security and an extra layer of authentication while cryptography focuses on protecting the meaning of documents. The document also outlines some advantages and disadvantages of each technique such as watermarking being more resistant to attacks but cryptography providing better security through encryption.
Study, analysis and formulation of a new method for integrity protection of d...ijsrd.com
The document presents a new method for ensuring integrity and confidentiality of digital data. It proposes an algorithm that creates a watermark based on the contents of a document, embeds the watermark without changing the document contents, and encrypts the text. The watermark is created by selecting the three most frequent keywords in the document and applying shuffling and substitution based on the keyword occurrences. This encrypted watermarked image can be extracted to authenticate and verify the document for tampering, thus proving integrity. The method aims to provide both confidentiality through encryption and integrity through watermark extraction.
This document summarizes a research paper on embedding digital signatures in video for security purposes. It discusses how digital watermarking can be used to authenticate digital video content by inserting copyright information. The paper proposes a method that uses discrete wavelet transform to embed different parts of a watermark image into different video scenes. It describes the watermark embedding process, which involves extracting video frames, applying DWT, dividing the watermark into parts, and embedding parts into DWT coefficients. Experimental results show the watermarked frames are visually similar to originals and maintain adequate quality metrics. The method aims to provide robust video authentication against various attacks.
STAGE STAFFING SCHEME FOR COPYRIGHT PROTECTION IN MULTIMEDIAIJNSA Journal
Copyright protection has become a need in today’s world. To achieve a secure copyright protection we embedded some information in images and videos and that image or video is called copyright protected. The embedded information can’t be detected by human eye but some attacks and operations can tamper that information to breach protection. So in order to find a secure technique of copyright protection, we have analyzed image processing techniques i.e. Spatial Domain (Least Significant Bit (LSB)), Transform Domain (Discrete Cosine Transform (DCT)), Discrete Wavelet Transform (DWT) and there are numerous algorithm for watermarking using them. After having a good understanding of the same we have proposed a novel algorithm named as Stage Staffing Algorithm that generates results with high effectiveness, additionally we can use self extracted-watermark technique to increase the security and automate the process of watermark image. The proposed algorithm provides protection in three stages. We have implemented the algorithm and results of the simulations are shown. The various factors affecting spatial domain watermarking are also discussed.
A Havoc Proof for Secure and Robust Audio WatermarkingCSCJournals
The audio watermarking involves the concealment of data within a discrete audio file. Audio watermarking technology affords an opportunity to generate copies of a recording which are perceived by listeners as identical to the original but which may differ from one another on the basis of the embedded information. A highly confidential audio watermarking scheme using multiple scrambling is presented Superior to other audio watermarking techniques, the proposed scheme is self-secured by integrating multiple scrambling operations into the embedding stage. To ensure that unauthorized detection without correct secret keys is nearly impossible, the watermark is encrypted by a coded-image; certain frames are randomly selected from the total frames of the audio signal for embedding and their order of coding is further randomized. Adaptive synchronization is improves the robustness against hazardous synchronization attacks, such as random samples cropping/inserting and pitch-invariant time stretching. The efficient watermarking schemes make it impossible to be detected and robust even though the watermarking algorithm is open to the public.
SECURING DIGITAL IMAGES USING WATERMARKING TECHNIQUE AND TRIPLE DES ALGORITHMJournal For Research
Multimedia security is very important issue for the today's internet technology because of duplication, distribution and exchanging if multimedia data. Digital watermarking is the method of shielding digital data in multimedia.Multimedia consist of image, audio, video, text, etc. In watermarking the secret information are implanted into the original data for protecting the ownership rights of the multimedia data. Basically watermarking has three domains.1) Spatial domain 2) Transform domain 3) Wavelet domain. This paper consist Discrete Cosine Transform which is the frequency domain works on the transform coefficient of the image. Three different keys are generated using Triple DES algorithm.
Report on Digital Watermarking Technology vijay rastogi
Digital watermarking is the process of embedding information into digital multimedia content such that the information (which we call the watermark) can later be extracted or detected for a variety of purposes including copy prevention and control.
This document provides an overview of steganography and watermarking techniques for hiding information in digital media. It defines steganography as "covered writing" involving hiding secret messages within other digital files like images, audio, or video. Common steganography methods embed data in the least significant bits of pixels or audio samples. Watermarking differs in embedding identifying marks that are robust to modifications and aim to protect copyrights. The document outlines various media and techniques for each, applications, advantages and limitations of both steganography and watermarking.
This document provides information about the Consumer Protection Act of 1986 in India. It was enacted to provide simpler and quicker redressal for consumer grievances. The act established consumer dispute redressal agencies at the district, state, and national levels to hear complaints. Key rights established for consumers include the right to protection from unsafe goods/services, the right to information about products, and the right to seek redress against unfair practices. The document outlines the composition and jurisdiction of district forums for filing complaints.
HUL is India's largest FMCG company with over 35 brands spanning 20 categories. In FY 2016-17, HUL had net sales of INR 33,895 Cr with 18,000 employees. It is a subsidiary of Unilever with 67% shareholding. The presentation analyzed HUL's financial performance from 2013-2017, comparing balance sheets, income statements, cash flows and key ratios. It also compared HUL's performance to competitors like Dabur, finding HUL more profitable and efficient. Finally, it provided an overview of the growing Indian FMCG industry and market segments.
This document discusses Indian Accounting Standard 3 on cash flow statements. It defines key terms like cash, cash equivalents, operating activities, investing activities and financing activities. It explains the direct and indirect methods of preparing cash flow statements and requirements around classification of cash flows from various transactions like tax, foreign exchange, dividends and interest. The standard aims to provide useful information on changes in cash balances to investors and other stakeholders.
Industrial automation is the use of control systems, such as computers or robots, and information technologies for handling different processes and machineries in an industry to replace a human being. It is the second step beyond mechanization in the scope of industrialization.
Increase Quality and Flexibility in Your Manufacturing Process
Earlier the purpose of automation was to increase productivity (since automated systems can work 24 hours a day), and to reduce the cost associated with human operators (i.e. wages & benefits). However, today, the focus of automation has shifted to increasing quality and flexibility in a manufacturing process. In the automobile industry, the installation of pistons into the engine used to be performed manually with an error rate of 1-1.5%. Presently, this task is performed using automated machinery with an error rate of 0.00001%.
Advantages of Industrial Automation
Lower operating cost: Industrial automation eliminates healthcare costs and paid leave and holidays associated with a human operator. Further, industrial automation does not require other employee benefits such as bonuses, pension coverage etc. Above all, although it is associated with a high initial cost it saves the monthly wages of the workers which leads to substantial cost savings for the company. The maintenance cost associated with machinery used for industrial automation is less because it does not often fail. If it fails, only computer and maintenance engineers are required to repair it.
Every year, millions of phones in India and over trillions all around the world are dumped. But what one doesn't think is the adverse effect of all this, and the damage to our environment this all causes.
This presentation enlists all of them, and also explains what are the minor changes we can make in the manufacturing materials list of our mobile phones which can possibly make them more environment-friendly.
An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave. Oscillators convert direct current (DC) from a power supply to an alternating current (AC) signal. They are widely used in many electronic devices. Common examples of signals generated by oscillators include signals broadcast by radio and television transmitters, clock signals that regulate computers and quartz clocks, and the sounds produced by electronic beepers and video games.
Oscillators designed to produce a high-power AC output from a DC supply are usually called inverters.
There are two main types of electronic oscillator: the linear or harmonic oscillator and the nonlinear or relaxation oscillator.
The term biophotonics denotes a combination of biology and photonics, with photonics being the science and technology of generation, manipulation, and detection of photons, quantum units of light. Photonics is related to electronics and photons. Photons play a central role in information technologies such as fiber optics the way electrons do in electronics.
Biophotonics can also be described as the "development and application of optical techniques, particularly imaging, to the study of biological molecules, cells and tissue". One of the main benefits of using optical techniques which make up biophotonics is that they preserve the integrity of the biological cells being examined.
A detailed description about Cryptography explaining the topic from the very basics. Explaining how it all started, and how is it currently being applied in the real world. Mostly useful for students in engineering and mathematics.
RISC - Reduced Instruction Set ComputingTushar Swami
This document discusses RISC (Reduced Instruction Set Computer) architecture. It includes a member list, outline of topics to be covered, and acknowledgements. The main topics covered are what RISC is, the background and history of RISC, characteristics of RISC like simplified instructions and pipelining, differences between RISC and CISC, performance equations, and applications of RISC like in mobile systems, high-end computing, and ARM and MIPS architectures. It concludes that over time, the differences between RISC and CISC have blurred as they have adopted each other's strategies.
This document provides information about Morse code. It discusses:
- What Morse code is and how it works using dots and dashes
- The history and key people involved in its invention and development, including Samuel Morse, Joseph Henry, and Alfred Vail
- How Morse code was transmitted through electrical telegraph wires, lights, sounds and its timing
- Changes made to Morse code over time, including the development of the American and Continental Morse codes
- Applications of Morse code such as in early radio communication and during World War 2, and current uses like in ham radio
- Mobile apps that can be used to learn and translate Morse code
MHealth or Mobile Health is an emerging and an innovative of medication in India, by doctors can communicate and treat their patients very conveniently even from far distances.
A detailed presentation on what is Heliophysics. It's the study of the sun and environment around it. Explaining some basic concepts regarding the same in a very interesting and innovative way.
This document provides an introduction to molecular orbital theory (MOT), which describes bonding between atoms using molecular orbitals formed from the combination of atomic orbitals. MOT allows prediction of electron distribution, molecular properties like shape and magnetism, and bond order strength. Principles of MOT include molecular orbitals having lower energy than separated atoms, causing electrons to prefer molecular bonds. Sigma and pi bonds are discussed, with sigma bonds symmetrical along the axis and pi bonds having side-by-side overlap with electron density above and below the axis. Bond order is calculated using the number of electrons in bonding and antibonding orbitals and indicates bond strength, with higher bond order meaning stronger, more stable bonds.
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.
The CBC machine is a common diagnostic tool used by doctors to measure a patient's red blood cell count, white blood cell count and platelet count. The machine uses a small sample of the patient's blood, which is then placed into special tubes and analyzed. The results of the analysis are then displayed on a screen for the doctor to review. The CBC machine is an important tool for diagnosing various conditions, such as anemia, infection and leukemia. It can also help to monitor a patient's response to treatment.
ACEP Magazine edition 4th launched on 05.06.2024Rahul
This document provides information about the third edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Comparative analysis between traditional aquaponics and reconstructed aquapon...bijceesjournal
The aquaponic system of planting is a method that does not require soil usage. It is a method that only needs water, fish, lava rocks (a substitute for soil), and plants. Aquaponic systems are sustainable and environmentally friendly. Its use not only helps to plant in small spaces but also helps reduce artificial chemical use and minimizes excess water use, as aquaponics consumes 90% less water than soil-based gardening. The study applied a descriptive and experimental design to assess and compare conventional and reconstructed aquaponic methods for reproducing tomatoes. The researchers created an observation checklist to determine the significant factors of the study. The study aims to determine the significant difference between traditional aquaponics and reconstructed aquaponics systems propagating tomatoes in terms of height, weight, girth, and number of fruits. The reconstructed aquaponics system’s higher growth yield results in a much more nourished crop than the traditional aquaponics system. It is superior in its number of fruits, height, weight, and girth measurement. Moreover, the reconstructed aquaponics system is proven to eliminate all the hindrances present in the traditional aquaponics system, which are overcrowding of fish, algae growth, pest problems, contaminated water, and dead fish.
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.
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.
3. ACKNOWLEDGEMENT
We would like to express our special thanks of gratitude to our teacher Dr. Natasha who
gave us the golden opportunity to present this wonderful presentation on the topic
(Secure Communication), which also helped us in doing a lot of Research and we came
to know about new things. We are really thankful to her.
4. SECURE COMMUNICATION?
When two entities are communicating and don’t want any third party to listen.
WHAT IS BEING DISCUSSED TILL NOW…
effective ways to communicate
Communicating
Method
Data Security
SUCCESSFUL COMMUNICATION
5. WHY DO WE NEED THIS?
We are living in an information age.
We need to keep information about every aspect of life,
so “INFORMATION IS AN ASSET”.
Thus, needed to be secured from attacks and misuse.
6. Secured Information means What?
– Confidentiality
Ensuring that information is
accessible only to those authoriz
ed to have access
– Integrity
Safeguarding the accuracy and
completeness of information and
processing methods
– Availability
Ensuring that authorized users
have access to information and
associated assets when required
10. Most commonly used method : CRYPTOGRAPHY.
It achieves security by encoding messages to make them unreadable.
Mathematical operations are applied on data to encrypt it.
KEY – used for encryption and decryption of data.
Cryptography
Symmetric (one key)
Asymmetric (two keys)
CRYPTOGRAPHY
13. DATA MASKING
Data masking is a method of creating a structurally similar but inauth
entic version of an organization's data that can be used for purposes
such as software testing and user training.
The purpose is to protect the actual data while having a functional
substitute for occasions when the real data is not required.
The main reason for applying masking to a
data field is to protect data that is classified as
personal identifiable data, personal sensitive data.
15. TYPES OF DATA MASKING
DATAMASKING
Static
On-the-fly
Dynamic
16. STATIC DATA MASKING
- Static Data Masking is done on the golden copy of the data base.
- Reduce the data set to a subset that holds the data necessary for a
particular round of testing, apply necessary code changes from source
control and push data to desired environment.
ON-THE-FLY DATA MASKING
On-the-Fly Data Masking happens in the process of transfer-
ring data from environment to environment without data
touching the disk on its way.
DYNAMIC DATA MASKING
Dynamic data masking happens at runtime, dynamically,
and on-demand so that there need not be a second data
source where to store the masked data dynamically.
17. TECHNIQUES OF DATA MASKING
Substitution Method
• It allows the masking to be
performed in such a manner
that another authentic looking
value can be substituted for
the existing value.
• 1: 1 mapping is done.
18. Shuffling Method
The shuffling method is a ve
ry common form of data obf
uscation. It is similar to the s
ubstitution method but it de
rives the substitution set fro
m the same column of data
that is being masked.
19. MASKING OUT
• Character scrambling or masking out of certain fields is also another
simplistic yet very effective method of preventing sensitive information
to be viewed.
• This is commonly applied to credit card data in production
systems.
Example : Credit Card No. XXXX XXXX XXXX 6789.
Applications
1) Used in Application and Software testing.
2) Used in various training programmes.
3) Used in Banking Facilities.
4) Used in customer service facilities like Call centres.
21. STEGANOGRAPHY
Steganography refers to the art and science of hiding secret
information in some other media.
The information to be hided is called the secret message.
The medium in which the information is hidden is called the
cover document.
The cover document containing hidden message is called the
s stego-document.
23. STEGANOGRAPHY APPROACH
There are two main approaches for Steganography.
SPATIAL DOMAIN APPROACH
The Data is hidden in the spatial domain of the cover document.
FREQUENCY DOMAIN APPROACH
Transform domain methods hide messages in non-significant areas of
the cover document.
24. APPLICATIONS
1) PRINTER STEGANOGRAPHY
Some modern printers use steganography, like HP laser printers These
printers add tiny yellow dots to each page.
2) Used by intelligence services and
many other organisations.
26. • Act of hiding a message related to a digital signal within the signal itself
• Watermarking tries to hide a message related to the actual content of the digital signal
• In steganography the digital signal has no relation to the message
INTRODUCTION
27. APPLICATIONS
1) Broadcast monitoring-
-To track when a specific video is being broadcast by a TV station.
-Important to advertising agencies
Information used to identify individual videos could be embedded in the videos
themselves using watermarking, making broadcast monitoring easier.
2) Owner identification-
-To identify the owner of a specific digital work of art(video or image)
-Important task, especially in cases related to copyright infringement.
So, instead of including copyright notices with every image or song, we could
use watermarking to embed the copyright in the image or the song itself.
28. Applications(contd.)
3) Transaction tracking-
-To record the recipient of every legal copy of a movie
-By embedding a different watermark in each copy.
If the movie is then leaked to the Internet, the movie producers could identify
which recipient of the movie was the source of the leak.
4) copy control-
-To prevent the illegal copying of songs
By embedding a watermark in them that would instruct a watermarking
compatible DVD or CD writer to not write the song or movie because it is an
illegal copy.
29. PROPERTIES
• Effectiveness - Probability that the message in a watermarked image will be correctly
detected
• Image fidelity - Watermarking is a process that alters an original image to add a
message to it
• The payload size - The size of embedded message is often important as many
systems require a relatively big payload to be embedded in a cover work.
• The false positive rate - This is the number of digital works that are identified to
have a watermark embedded when in fact they have no watermark embedded.
• Robustness - A robust watermark should be able to withstand additive Gaussian
noise, compression, printing and scanning, rotation, scaling, cropping, etc.
30. • very similar to the traditional models
of communication systems
• Watermarking - a process of
communicating a message from the
watermarking embedder to the
watermarking receiver.
• images, can be viewed as high-
dimensional vectors, called the media
space.
• For example a 512 X 512 image
would be described as a 262144
elements vector in a 262144-
dimensional space.
• useful to better visualize the
watermarking process using a
number of regions
WATERMARKING
MODELS
Communication-
based view
Geometric view
31. • The embedding region- all the possible images resulting from the
embedding of a message inside an unwatermarked image
• The detection region - images from which a watermark can be
successfully extracted
• The region of acceptable fidelity - images resulting from the
embedding of a message into an unwatermarked image(identical to
the original image)
• The embedding region for a given watermarking system lie inside the
intersection of the detection region and the region of acceptable
fidelity
GEOMETRIC MODEL
32. Communication-based Model
• Sender on one side would encode a message
using encoding key
• Then the message would be transmitted on a
communications channel, which would add
some noise to encoded message
• The resulting noisy message would be received
at the other end, which would decode it using a
decoding key, to get the original message back
• Can be further divided into two sub-categories:
• Uses side-information
• Does not use side-information at all
The term side information refers to any auxiliary
information except the input message itself, that can
be used to better encode or decode it.
33. Watermarking without
side-information
• The image is simply considered as
another form of channel noise that
distorts the message during its
transmission
• The watermark embedder encodes a
message using a watermark encoder and
a key
• This is then added to the original image
and transmitted over the communication
channel which adds some noise
• The watermark detector at the other end
receives the noisy watermarked image
and decode the original image using a
key
34. Watermarking with side-information
• The only difference is the use of the
original image
• The watermark embedder still encodes a
message using not only a key but also
the information provided by the original
image
• The resulting encoded message is then
added to the original image as in the
case of the no-side-information model
• The watermarking detector tries to get
the original message back using the
original key and a detection algorithm
37. MOBILE PHONES
Signal most vulnerable to attack when going
from tower to mobile device.
Hence, encryption method is needed there.
To avoid eavesdropping, the cipher key
is sent separately.
WHATSAPP
Few months ago, WhatsApp employed
end-to-end encryption mechanism to
ensure its users’ messages security.
38. SECURE NETWORK COMMUNICATIONS
SECURE SOCKET LAYER (SSL)
a public-key protocol for providing data security layered between TCP/IP.
used for establishing an encrypted link between a server and a client.
SSL allows sensitive information to be transmitted securely.
SSL secures millions of peoples' data on the Internet every day, especially when
transmitting some confidential information.
HOW TO SPOT A SSL-SECURED WEBSITE
They have a lock icon being displayed or green
address bar that comes with an extended validation
for SSL-secured website.
SSL-secured websites also begin with https rather
than http.
41. Majorly used techniques for data security explained.
But attackers are getting advanced with time.
Hence, this field requires constant development.
So that people can rely more on the new communication techniques
rather than conventional methods, and our PM’s dream of
“DIGITAL INDIA” can become a propitious reality.