# Cryptography and Cyber Security for BE Anna University R21CBCS (V - CSE - CB3491)

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Syllabus Cryptography and Cyber Security - (CB3491) UNIT I INTRODUCTION TO SECURITY Computer Security Concepts - The OSI Security Architecture - Security Attacks - Security Services and Mechanisms - A Model for Network Security - Classical encryption techniques : Substitution techniques, Transposition techniques, Steganography - Foundations of modern cryptography : Perfect security - Information Theory - Product Cryptosystem - Cryptanalysis. (Chapter - 1) UNIT II SYMMETRIC CIPHERS Number theory - Algebraic Structures - Modular Arithmetic - Euclid‘s algorithm - Congruence and matrices - Group, Rings, Fields, Finite Fields SYMMETRIC KEY CIPHERS : SDES - Block Ciphers - DES, Strength of DES - Differential and linear cryptanalysis - Block cipher design principles - Block cipher mode of operation - Evaluation criteria for AES - Pseudorandom Number Generators - RC4 - Key distribution. (Chapter - 2) UNIT III ASYMMETRIC CRYPTOGRAPHY MATHEMATICS OF ASYMMETRIC KEY CRYPTOGRAPHY: Primes - Primality Testing - Factorization - Euler’s totient function, Fermat’s and Euler’s Theorem - Chinese Remainder Theorem - Exponentiation and logarithm. ASYMMETRIC KEY CIPHERS : RSA cryptosystem - Key distribution - Key management - Diffie Hellman key exchange - Elliptic curve arithmetic - Elliptic curve cryptography. (Chapter - 3) UNIT IV INTEGRITY AND AUTHENTICATION ALGORITHMS Authentication requirement - Authentication function - MAC - Hash function - Security of hash function : HMAC, CMAC - SHA - Digital signature and authentication protocols - DSS - Schnorr Digital Signature Scheme - ElGamal cryptosystem - Entity Authentication : Biometrics, Passwords, Challenge Response protocols - Authentication applications - Kerberos. MUTUAL TRUST : Key management and distribution - Symmetric key distribution using symmetric and asymmetric encryption - Distribution of public keys - X.509 Certificates. (Chapter - 4) UNIT V CYBER CRIMES AND CYBER SECURITY Cyber Crime and Information Security - classifications of Cyber Crimes - Tools and Methods - Password Cracking, Keyloggers, Spywares, SQL Injection - Network Access Control - Cloud Security - Web Security - Wireless Security. (Chapter - 5)

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