Cryptography and Network Security 6th ND12 IT2352

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Anna University Chennai

B.E/B.Tech DEGREE EXAMINATION, NOVEMBER/ Dec 2012,

B.Tech Computer Science / B.Tech Information Technology

6th / 7th semester

IT2352/IT 62 CRYPTOGRAPHY AND NETWORK SECURITY

REGULATION 2008

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Part A

1.What is the difference between a mono alphabetic and a poly alphabetic cipher?
2.What is an avalanche effect?
3.What are the disadvantages of double DES?
4.Define primitive root.
5.What is one-way property?
6.What are the two approaches of digital signatures?
7.What are the different types of MIME?
8.What protocols comprise SSL?
9.What is an Intruder?
10.Give few examples for worms.



Part B

11.a.Explain briefly about Fermats and Eulers theorems.
(or)
b.Explain the following with suitable examples.

12.a.Discuss about DES in detail.
(or)
b.Explain briefly about RSA and discuss its merit.

13.a.Explain briefly about Diffie Hellman key exchange algorithm with its pros and cons.
(or)
b.Describe about Hash functions.

14.a.Write about PGP in detail.
(or)
b.Explain in detail about SET.

15.a.Explain about viruses in detail.
(or)
b.Explain in detail about firewalls.