Total No. of Questions 18] [Total No. of Pages 02
M.Sc. DEGREE EXAMINATION, MAY 2017
(Second Year)
INFORMATION TECHNOLOGY
Cryptography Network Security
Time 3 Hours Maximum Marks 70
SECTION-A
Answer three questions × 15 45)
Q1) Explain about fermat's and Euler's theorems.
Q2) Discuss about DES in detail.
Q3) Describe the steps in message digest generation in secure hash algorithm in detail.
Q4) Explain about digital signature algorithm with example.
Q5) Explain about PGP message generation and reception.
SECTION-B
Answer Five questions × 4 20)
Q6) Differentiate active and passive attack. Which attack is related to confidentiality?
Q7) Explain about network security model with neat diagram.
Q8) What are the principle elements of public key crypto systems?
Q9) Define S/MIME? What are the elements of MIME?
Q10) Compare SHA-1 and MD5 algorithms.
Q11) What is MAC? Describe the functioning of MAC.
Q12) Draw the IP security authentication header.
Q13) Perform encryption and decryption using RSA algorithm for the following p
q 11, e 17 and M 8.
SECTION-C
Answer All questions × 1
Q14) Define firewall.
Q15) Define public key and private key.
Q16) Define trusted system.
Q17) Define virus.
Q18) Define message digest.