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SYLLABUS

UNIT-I

Security Concepts: Introduction, The Need for Security, Security Approaches, Principles of Security, Types of Security Attacks, Security Services, Security Mechanisms, A Model for Network Security. Cryptography Concepts and Techniques: Introduction, Plain Text and Cipher Text, Substitution Techniques, Transposition Techniques, Encryption and Decryption, Symmetric and Asymmetric Key Cryptography, Steganography, Key Range and Key Size, Possible Types of Attacks.

UNIT-II

Symmetric Key Ciphers: Block Cipher Principles, DES, AES, Blowfish, RC5, IDEA, Block Cipher Operation, Stream Ciphers, RC4. Asymmetric Key Ciphers: Principles of Public Key Cryptosystems, RSA Algorithm, Elgamal Cryptography, Diffie-Hellman Key Exchange, Knapsack Algorithm.

UNIT-III

Cryptographic Hash Functions: Message Authentication, Secure Hash Algorithm (SHA-512). Message Authentication Codes: Authentication Requirements, HMAC, CMAC, Digital Signatures, Elgamal Digital Signature Scheme. Key Management and Distribution: Symmetric Key Distribution Using Symmetric and Asymmetric Encryption, Distribution of Public Keys, Kerberos, X.509 Authentication Service, Public-Key Infrastructure.

UNIT-IV

Transport-level Security: Web Security Considerations, Secure Socket Layer and Transport Layer Security, HTTPS, Secure Shell (SSH). Wireless Network Security: Wireless Security, Mobile Device Security, IEEE 802.11 Wireless LAN, IEEE 802.11i Wireless LAN Security.

UNIT-V

E-Mail Security: Pretty Good Privacy, S/MIME. IP Security: IP Security Overview, IP Security Architecture, Authentication Header, Encapsulating Security Payload, Combining Security Associations, Internet Key Exchange. Case Studies on Cryptography and Security: Secure Multiparty Calculation, Virtual Elections, Single Sign On, Secure Inter-branch Payment Transactions, Cross Site Scripting Vulnerability.