IT2352 CRYPTOGRAPHY AND NETWORK SECURITY ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER / MODEL QUESTION PAPER NOV/DEC 2011 ...

IT2352 CRYPTOGRAPHY AND NETWORK SECURITY ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER / MODEL QUESTION PAPER NOV/DEC 2011 ...


Posted by R.Anirudhan


B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011.
Seventh Semester
Computer Science and Engineering
IT 2352 – CRYPTOGRAPHY AND NETWORK SECURITY
(Common to Sixth Semester Information Technology)
(Regulation 2008)
Time : Three hours                                                    Maximum : 100 marks
Answer ALL questions.
PART A — (10 × 2 = 20 marks)

1. Give the types of attack.
2. List out the problems of one time pad?
3. Write down the purpose of the S-Boxes in DES?
4. Define : Diffusion.
5. Define: Replay attack.
6. List out the parameters of AES.
7. Define : Primality test.
8. State the difference between conventional encryption and public-key encryption.
9. Define : Malicious software.
10. Name any two security standards.


PART B — (5 × 16 = 80 marks)


11. (a) Using play fair cipher algorithm encrypt the message using the key ‘‘MONARCHY’’ and explain.

Or
(b) Explain the ceaser cipher and monoalphabetic cipher.


12. (a) Explain the Key Generation, Encryption and Decryption of SDES algorithm in detail.

Or
(b) Write the algorithm of RSA and explain with an example.


13. (a) Illustrate about the SHA algorithm and explain.

Or
(b) Write a detailed note on Digital signatures.


14. (a) Describe the SSL Architecture in detail.

Or
(b) List out the participants of SET system, and explain in detail.


15. (a) Explain the types of Intrustion Detection Systems.

Or
(b) Explain the different types of firewall and its configurations in detail.
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