SRM University 2011-7th Sem B.Tech Electronics and Communications Engineering (P.T)/ECE/ester/Network Security - Question Paper

B.Tech(PT) DEGREE EXAMINATION, DECEMBER 2011

Seventh Semester

PEC055-NETWORK SECURITY

PART-A (10*2 = 20 Marks)

1. Distinguish ranging from active and passive attacks.
2. What is traffic analysis?
3. List the advantages of CTR mode
4. What primitive operations are used in RC5?
5. Mention the merits of digital signature
6. Define: Weak collision property of hash function
7. Illustrate X.509 certificate general format
8. What services are given by IPsec?
9. What is honeypot?
10.List the design goals of firewall.

PART-B (5*16=80 Marks)

11.a.i explain in detail about Hill Cipher. (10 Marks)
ii Write short notes on Stegnography. (6 Marks)

(OR)

b. define DES and all its essential aspects. (16 Marks)

12.a.i discuss IDEA algorithm in detail (10 Marks)
ii Write about Cipher block chaining mode operation (6 Marks)

(OR)

b. Discus in detail the various ways of distribution of public keys (16 Marks)

13.a. Briefly discuss Diffie Hellmen key exchange with an example (16 Marks)

(OR)

b.i Briefly discuss digital signal algorithm (8 Marks)
ii explain clearly about secure hash algorithm (8 Marks)

14.a.i What is Kerberos? discuss the Kerberos version four in detail (10 Marks)
ii Draw the IP Sec authentication header and discuss briefly (6 Marks)

(OR)

b. explain transmission and reception of PGP messages with needed flow diagram (16 Marks)

15.a. Define: Intrusion detection and the various kinds of detection mechanisms in detail (16 Marks)

(OR)

b.i discuss firewalls and how they prevent intrusion? (12 Marks)
ii discuss the concept of reference monitor (4 Marks)

Earning:   Approval pending.