B.C.A. (Three Year) DEGREE EXAMINATION, OCTOBER 2018
End Semester Examination
Fifth Semester
(Regular/Supplementary)
NETWORK SECURITY
2 C 5501
Time 3 Hours Max. Marks 70
PART — A
Answer any FIVE of the following questions. 4 20 Marks)
1. What are the cipher principles?
2. Explain Diffie-Hellman key exchange.
3. What are authentication requirements?
4. What is web security?
5. What is S/MIME?
6. Explain about Intrusion detection.
7. What are threats?
8. Explain about cryptography.
PART — B
Answer ALL the following questions. 10 50 Marks)
9. Explain about Block cipher design principles.
Or
Explain about public key cryptography.
10. Explain about Elliptic curve architecture.
Or
Explain about message authentication codes and hash functions.

11. Explain about RIPEMD.
Or
Explain about HMAC digital signatures.
12. Explain about PGP and kerberos.
Or
Explain about Email security and IP security.
13. Explain about Firewall design principles.
Or
Explain about Virus counter measures.
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