Download JNTUH MCA 4th Sem R13 2017 August 814AT Information Security Question Paper

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Code No: 814AT

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JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA IV Semester Examinations, August - 2017

INFORMATION SECURITY

Time: 3 Hours Max. Marks: 60

Note: This question paper contains two parts A and B.

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Part A is compulsory which carries 20 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 8 marks and may have a, b, c as sub questions.

PART - A 5 x 4 Marks = 20

1. a) Define authentication, confidentiality, Non-repudiation, Availability.
2. b) Write a short note on Deffie Hellman Key Exchange Algorithm.
3. c) What are the properties of Hash function in cryptography?

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4. d) Briefly discuss about the concept of combining security associations.
5. e) Write short notes on Password selection strategies and their significance.

PART - B 5 x 8 Marks = 40

1. Compare and Contrast between Symmetric and Asymmetric key cryptography. [8]
   OR
   

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   With a neat sketch explain the model for inter network security. [8]
2. With a neat diagram explain how encryption and decryption techniques works for DES. [8]
   OR
   Perform encryption and decryption using RSA Alg. for the following. P=7; q=11; e=17; M=8. [8]
3. Give a neat sketch to explain the concept of HMAC. [8]
   

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   OR
   Client machine C wants to communicate with server S. Explain how it can be achieved through Kerberos protocol? [8]
4. How the messages are generated and transmitted in pretty good privacy (PGP) protocol? Explain with clear diagrams. [8]
   OR
   Explain in detail about the various services provided in IPSec. [8]

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5. With a neat diagram explain in detail about Secured Electronic Transactions (SET). [8]
   OR
   List the characteristics of a good firewall implementation. How is circuit gateway different from application gateway? [8]

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