Unit IIntroduction to Information Security Foundations of Security, Computer Security Concepts, The OSI Security Architecture, Security attacks, Security services, Security mechanism, A Model for Network Security. (Chapter - 1) Unit II Symmetric Key Cryptography Classical Encryption Techniques : Stream Ciphers, Substitution Techniques : Caesar Cipher, Mono alphabetic Ciphers, Play fair Cipher, Hill Cipher, Poly alphabetic Ciphers, Transposition Techniques, Block Ciphers and Data Encryption standards, 3DES, Advanced Encryption standard. (Chapter - 2) Unit III Asymmetric Key Cryptography Number theory : Prime number, Fermat and Euler theorems, Testing for primality, Chinese reminder theorem, discrete logarithm, Public Key Cryptography and RSA, Key Management, Diffie-Hellman key exchange, El Gamal algorithm, Elliptic Curve Cryptography. (Chapter - 3) Unit IV Data Integrity Algorithms And Web Security Cryptographic Hash Functions : Applications of Cryptographic Hash Functions, Two Simple Hash Functions, Requirements and Security, Hash Functions Based on Cipher Block Chaining, Secure Hash Algorithm (SHA), SHA-3, MD4, MD5. Message Authentication Codes : Message Authentication Requirements, Message Authentication Functions, Requirements for Message Authentication Codes, Security of MACs. Digital Signatures : Digital Signatures, Schemes, Digital Signature standard, PKI X.509 Certificate. Web Security issues, HTTPS, SSH, Email security : PGP, S/MIME, IP Security : IPSec. (Chapter - 4) Unit V Network and System Security The OSI Security architecture, Access Control, Flooding attacks, DOS, Distributed DOS attacks Intrusion detection, Host based and network based Honeypot, Firewall and Intrusion prevention system, Need of firewall, Firewall characteristics and access policy, Types of Firewall, DMZ networks, Intrusion prevention system : Host based, Network based, Hybrid. Operating system Security, Application Security, Security maintenance, Multilevel Security, Multileve
