Download JNTUH MCA 4th Sem R15 2019 December 824AE Information Security Question Paper

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Code No: 824AF R15

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MCA IV Semester Examinations, December - 2019
INFORMATION SECURITY
Time: 3hrs Max.Marks:75
Note: This question paper contains two parts A and B.

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PART - A 5 x 5 Marks =25

1. Explain the model for network security. 5
2. Discuss about Linear and differential cryptanalysis? 5
3. What is the function of TGS server in Kerberoes. 5

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4. Draw and explain fields in AH header. 5
5. What are the limitations of firewalls? 5

PART -B 5 x 10 Marks =50

1. Give an example to explain the concept of transposition ciphers in detail. [10]
   OR
   

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   Compare and Contrast between Symmetric and Asymmetric key cryptography. [10]
2. In an RSA system, the public key of a given user is e=31, n=3599. What is the private key of this user? [10]
   OR
   Explain DES algorithm with suitable examples. Discuss its advantages and limitations [10]
3. Give a neat sketch to explain the concept of Secure Hash Algorithm (SHA). [10]
   

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   OR
   With the help of an example explain how knapsack algorithm is used for authentication? [10]
4. Explain the operation PGP message generation and message reception. [10]
   OR
   Draw the IP security authentication header and explain the functions of each field. [10]

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5. Explain the steps involved in performing Secure Inter-branch Payment Transactions. [10]
   OR
   List the characteristics of a good firewall implementation? How is circuit gateway different from application gateway? [10]

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