Sc (Information technology) Paper I; SUBJECT: Network Security Periods per week Lecture 1 Period is 50 minutes TW/Tutorial/Practical Evaluation System Theory Examination TW/Tutorial/Practical Semester – V 5 3 Hours 2 -Marks 60 40 Unit-I Cryptography: Introduction: Some Simple Cryptosystems‚ The Shift Cipher‚ The Substitution Cipher‚ The Affine Cipher‚ The Vigenere Cipher‚ The Hill Cipher‚ The Permutation Cipher‚ Stream Ciphers‚ Cryptanalysis‚ Cryptanalysis of the Affine Cipher‚ Cryptanalysis
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cannot be guaranteed‚ and without authentication‚ neither the merchant nor the consumer can be sure that valid transactions are being made. Technology Secure Electronic Transactions (SET) relies on the science of cryptography – the art of encoding and decoding messages. Cryptography dates back many centuries – even in the time of Julius Caesar‚ encryption was used to preserve the secrecy of messages. Preserving the secrecy of transactions is no different‚ though stronger encryption algorithms are
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Walter Taylor March 29‚ 2013 Computer Security Kris Rowley Cryptography Diffie-Hellman Key Exchange What it is: A specific method for exchanging cryptographic keys in which two users can communicate through a secret key and a public key (Problem). “The simplest‚ and original‚ implementation of the protocol uses the multiplicative group of integers modulo p‚ where p is prime and g is primitive root mod p. Here is an example of the protocol‚ with non-secret values in blue‚ and secret values
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Security. A model of Inter network Security‚ Steganography‚ One time PADS. Unit II: Basic and ESOTERIC Cryptographic Protocols: Key Exchange‚ Authentication‚ Formal Analysis of Authentication and key Exchange Protocols‚ Multiple & Public Key Cryptography‚ Secret Splitting & Sharing Secure elections‚ Secure multiparty‚ Communication‚ Digital Cash. Unit III: Crypto Graphic Algorithms (Block Cipher): RC2‚ GOST‚ CAST‚ BLOW FISH‚ SAFEER‚ RC5‚ NEWDES‚ CRAB‚ Theory of Block Cipher design.
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secret messages unreadable. This is known as Cryptography [1] . The main objective of Cryptography is to communicate securely in such a way that the true message cannot be intercepted by an attacker. There are two types of cryptographic schemes available on the basis of key. They are: Symmetric Key Cryptography: This cryptographic scheme makes use of a single key for the encryption and decryption of the message [1] . Asymmetric or Public Key Cryptography: This cryptographic scheme makes use of
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Steganographic Algorithm using Cryptographic Encryption RSA Algorithms Manoj Kumar Sharma‚ Jaipur National University Dr. Amit Upadhyaya‚ Jaipur National University Shalini Agarwal‚ Pursuing M.Tech‚ Banasthali University‚ Banasthali ABSTRACT Cryptography is the art of securing information by applying encryption and decryption on transmission data which ensure that the secret can be understood only by the right person.[1] Steganography is the process of sharing information in an undetectable way
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and future wireless standards. – Introduction and overview (1 Lecture) – – – – – – – Introduction to Cryptography: (2 lectures) Terminology steganography‚ substitution and transformation ciphers‚ XOR‚ one-time pads‚ Protocol Building Blocks: (3 Lectures) Communications using symmetric cryptography‚ one-way hash functions‚ communications using public-key cryptography‚ digital signatures‚ Basic Protocols: (2 lectures) Key exchange‚ authentication‚ secret splitting‚ secret sharing
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Blu-Ray Disc Mir Nazish Hussain S. N. Murthy Kalluri Dept. of Computer Science & Engg. Koneru Lakshmaiah College of Engineering‚ Vadeeswaram‚ Guntur. Abstract The thrust for an advanced format of data storage on optical disc led to revolutionary introduction of BLU-RAY DISC. This advances in the race against its competitors DVD (Digital Video Disc) & AOD (Advanced Optical Disc) in that it has high storage capacity‚ advanced security and privacy features and the
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secure authenticated connection between client\browsers and servers (Martin‚ 2012). Later Internet Engineering Task Force (IETF) took its responsibility. The SSL protocol has three basic properties: a. Symmetric cryptography is used to encrypt data and public key cryptography is used to establish symmetric key (Freier‚ Karlton & Kocher‚ 2011). b. Peer’s identity is authenticated using digital signatures. c. Data origin authentication and peer authentication is checked using a keyed Message
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code. In order to read an encrypted file‚ the receiver of the file must obtain a secret key that will enable him to decrypt the file. A deeper look into cryptography‚ cryptanalysis‚ and the Data Encryption Standard (DES) will provide a better understanding of data encryption. Cryptographic Methods There are two standard methods of cryptography‚ asymmetric encryption and symmetric encryption. Data that is in its original form (unscrambled) is called plaintext. Once the data is scrambled and in
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