B.TECH - Semester 8 cryptography and network security Question Paper 2013 (apr)

Practice authentic previous year university questions for better exam preparation.

Sample Questions

What is diffusion in cryptography?
Write short note on caeser cipher.
State Fermat's little Theorem.
Explain the term HTTPS.
Explain the term S/MIME. PART - B Answer any one full questions from each Module.
(a) Explain IDEA algorithm. 10
(b) Explain DES algorithm with block diagrams. 10 OR P.T.O. HENEN
(a) Explain AES algorithm with block diagrams.
(b) What is 3 DES? Explain. Module - II
(a) Explain RSA algorithm with suitable example. 10
(b) Explain Diffie Hellman key exchange algorithm. OR
(a) Calculate 3 G with respect to elliptic curve crypto system $\mathrm{E} 11(1,6)$ (select G as $(2,7)$ ). 12
(b) Explain Elliptic Curve cryptography. 4
(c) What are the advantages of elliptic curve cryptography over RSA algorithm? 4 Module - III
(a) Explain different PGP cryptographic functions with diagrams. 12
(b) Explain transmission and reception of PGP messages using flow charts. 8 OR
(a) What is the difference between transport mode SA and Tunnel mode SA in the context of IP security? 13
(b) Explain different types of services of IPSec at IP layer. 7 N - 5775
(a) Explain different types of firewalls with neat diagrams. ..... 16
(b) Write short note on secure electronic transactions. ..... 4
(a) Explain TLS function with block diagrams. ..... 8
(b) Explain SSL hand shake protocol actions with diagram. ..... 12 $$ (4 \times 20=80 \text { Marks }) $$