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.

Block Cipher principles, DES, AES, Blowfish, Block cipher modes of operation, Stream ciphers, RC4, Key distribution.

Principles of public key cryptosystems, RSA, Diffie-Hellman, ECC, Key Distribution.

Authentication requirements, elements of transport protocols, Functions, Message authentication codes, Hash Functions, Secure hash algorithm, HMAC, CMAC, Digital signatures.

Pretty Good Privacy, S/MIME
IP Security : IP Security overview, IP Security architecture, Authentication Header, encapsulating security payload, combining security associations, key management.