Unit 6 · Cryptography and Network Security

# Syllabus

Not in the official syllabus, but asked in the joint CSE/IT paper every year.

# Topics

• 6.1Cryptography Basics, Cryptanalysis & Steganography★ PYQ
• 6.2Classical Ciphers: Substitution & Transposition★ PYQ
• 6.3Symmetric vs Asymmetric Encryption★ PYQ
• 6.4Feistel Cipher★ PYQ
• 6.5Hashing vs Encryption★ PYQ
• 6.6Firewalls, Packet Filtering & Proxy Servers★★ PYQ
• 6.7IDS & IPS★★ PYQ
• 6.8SSL/TLS★★ PYQ
• 6.9IP Security (IPSec)★★
• 6.10E-mail Security: PGP & S/MIME★★★ PYQ