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Posted Date: 13 Feb 2011 Posted By:: Rinil Member Level: Gold Points: 5 (Rs. 1)
2009 Calicut University B.Tech Computer Science and Engineering Cryptography and network security Question paper
SEVENTH SEMESTER B.TECH. (ENGINEERING) DEGREE EXAMINATION, JUNE 2009
CSIIT 04 702 -CRYPTOGRAPHY AND NETWORK SECURITY
Time: Three Hours Maximum : 100 Marks
Answer all questions.
Each question carries 5marks.
I. (a) What is Euler's totient? Explain.
Explain on Passive and Active attacks.
Explain the approaches to attacking RSA algorithm.
Specify the requirements for hash function.
Explain the use offair coin flip Algorithm.
. What ia ...broadcuting?
Explain_the working principle ofKerberos.
Describe the transport and tunnel modes of Encapsulating Security Payload. (8 x 5 =40 marks)
Each question carries 15 marks.
n. (a) (i) Explain how secret keys can be distributed to two communication parties.
(ii) Explain Steganography. (7 + 8 =15 marks)
\ (b) Explain the DES encryption scheme in detail.
m. (a) Discuss in detail about the RSA crypto system.
(b) What is Message authentication code? Explain.
(a) Explain any two Secret sharing schemes.
Write short notes on:
(7 + 8 = 15 marks)
Explain the issues in Web Security.
(b) Explain on:
Password Selection Strategies.
ISO authentication framework.
(7 +8 = 15 marks)
[4 )( 15 = 60 marks1
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