Paper Code: ETIT 412	L          T          C
Paper: Network Security	3           1           4

UNIT - I

Introduction:

Codes and Ciphers – Some Classifical systems – Statistical theory of cipher systems – Complexity theory of Crypto systems – Stream ciphers, Block ciphers.

Stream Ciphers:

Rotor based system – shift register based systems – Design considerations for stream ciphers – Cryptanalysis of stream ciphers – Combined eneryption and encoding.
Block Ciphers – DES and variant, modes of use of DES.

UNIT - II

Public Key systems – Knacksack systems – RSK – Diffle Hellman Exchange 0 Authentication and Digital signatures, Elliptic curve based systems.
System Identification and clustering
Cryptology of speech signals – narrow band and wide band systems – analogue & digital systems of speech encryption.

UNIT - III

Network Security:

Hash function – Authentication
Protocols – Digital Signature standards.
Electronics Mail Security – PGP (Pretty Good Privacy) MIME, Data Compression technique.

IP Security:

Architecture, Authentication Leader, Encapsulating security Payload – Key management.

Web Security:

Secure Socket Layer & Transport Layer security, Secure electronic transactions.
Firewalls Design principle, established systems.

UNIT - IV

Telecommunication Network architecture, TMN management layers, Management information Model, Management servicing and functions, Structure of management information and TMN information model.

TEXT BOOKS:

1. William Stallings, “Network Security Essentials, 2nd Edition, 2002.
2. William Stallings, “Cryptography & Network Security”, 3rd Edition, 1999.