DISTANCE EDUCATION
M.Sc. (Software Engineering) Years Integrated) DEGREE
EXAMINATION, DECEMBER 2017.
CRYPTOGRAPHY AND NETWORK SECURITY
Time Three hours Maximum 100 marks
SECTION A — × 8 40 marks)
Answer any FIVE of the following.
1. Explain the Security Attacks.
2. Write about the approaches to Message Authentication.
3. Discuss the conventional encryption principles.
4. Explain the RSA public-key encryption algorithm.
5. Explain briefly about the X.509 directory authentication
service.
6. Discuss the principal services provided by PGP.
7. Write about the nature and the types of viruses.
8. Write about the types of firewalls.
SECTION B — × 15 60 marks)
Answer any FOUR questions.
9. Write in detail about security services.
10. Explain the various cipher block modes of operation.
Sub. Code
52
DE-3049
WSS
2
11. Discuss in detail about secure Hash functions.
12. Explain briefly about Kerberos.
13. Write briefly about secure/multipurpose Internet Mail
Extension (S/MIME).
14. Write briefly about secure socket layer.
15. Explain in detail about intrusion detection systems.
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