Network Security

Description

Network security comprises of the strategies, cycles and practices embraced to forestall, recognize and screen unapproved access, abuse, alteration, or disavowal of a PC organization and organization open assets.

Syllabus

• Unit-1 Introduction to Network Security
  • Attacks, Services and Mechanisms
  • Security Attacks
  • Security Services
  • Integrity check
  • Digital Signature
  • Authentication.
• Unit-2 Secret Key Cryptography
  • Block Encryption
  • DES rounds
  • S-Boxes
  • IDEA: Overview
  • Comparison with DES
  • Key expansion
  • IDEA rounds
  • Uses of Secret key Cryptography.

• Unit-3 Hash Functions and Message Digests
  • Length of hash
  • Uses of hash algorithm
  • Algorithms (MD2, MD4,MD5,SHS).
• Unit-4 Public key Cryptography
  • Algorithms
  • Examples, Modular arithmetic (addition, multiplication, inverseand exponentiation)
  • RSA: generating keys
  • Encryption and decryption
  • Other Algorithm i.e. Diffie-Hellman.

• Unit-5 Authentication
  • Password Based, Address Based, Cryptographic Authentication. Passwords in
  • Distributed systems, on -line vs. off -line guessing, storing.
  • Cryptographic Authentication: passwords as keys, protocols, KDC’s Certification
  • Revocation, Inter-domain, groups, delegation. Authentication of People: Verification techniques, passwords, length of passwords, password distribution, smart cards, biometrics.
• Unit-6 Security Policies and Security Handshake Pitfalls
  • What is security policy, high and low level policy, user issues.
  • Protocol problems, assumptions, Shared secret protocols, public key protocols.
  • mutual authentication, reflection attacks, use of timestamps,
  • session keys, one-and two-way public key based authentication

• Unit-7 Example System
  • Kerberos: purpose, authentication, server and ticket granting server, keys and
  • Tickets, use of AS and TGS, replicated servers. Kerberos V4: names, inter-realm
  • forwarding and proxies, ticket lifetimes, revoking tickets, multiple Realms
• Unit-8 Network Security
  • Electronic mail security, IP security, Network management security.
• Unit-9 Security for electronic commerce
  • SSL, SET
• Unit-10 System Security
  • Intruders and Viruses, Firewalls, Intrusion Detection