MCA - 3102
2034/-I/03
M.C.A. DEGREE EXAMINATION-2003 Third Year
FIRST SEMESTER
NETWORK SECURITY
(Effective from the admitted batch of2000 - 200 1)

Time: 3 Hours
Max. Marks: 75

First question is Compulsory.
Answer any four from the remaining questions.
All questions carry equal marks.
Answer all parts of any question at one place.

1. a) What are the objectives of Data Security?
b) What is Trojan Horse.
c) Name services provided by PEM for E-mail.
d) Write Euclids Algorithm.
e) Write short notes on viruses

2. a) Explain DES Algorithm and Triple DES Algorithm.

3. a) Perform encryption, Decryption using RSA Algorithm for the primes p = 5, q = 11, Public key = 3, Message M = 5

b) Explain key management in Public key systems.

4. Explain confidentiality techniques for cryptography.

5. a) What are different web security threats.
b) Describe how the digital encryption works in PGP.

6. a. Discuss about design principles of firewalls.
b. Describe IP Security Architecture

7. a. Write about Transport Layer Security
b. Explain different approaches to intrusion detection.

8. a. Explain
i. Electronic Mail Security
ii. Web Security

b. Explain Relationship between Digital Signature and Digital Certificate