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

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 4th Sem (Fourth Semester) Regulation-R15 2019 December 824AE Information Security Previous Question Paper

R15

Code No: 824AE















JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA IV Semester Examinations, December - 2019

INFORMATION SECURITY

STime: 3hrs Max.Marks:75


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

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries
10 marks and may have a, b, c as sub questions.



PART - A



















5 ? 5 Marks = 25



1.a) Explain the model for network security .











[5]

b) Discuss about Linear and differential cryptanalysis?







[5]

c)

What is the function of TGS server in Kerberoes.







[5]

d)

Draw and explain fields in AH header.











[5]

e) What are the limitations of firewalls?











[5]

PART - B

















5 ? 10 Marks = 50



2.

Give an example to explain the concept of transposition ciphers in detail.

[10]

OR

3.

Compare and Contrast between Symmetric and Asymmetric key cryptography.

[10]



4.

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

5.

Explain DES algorithm with suitable examples.Discuss its advantages and limitations[10]


6.

Give a neat sketch to explain the concept of Secure Hash Algorithm (SHA).

[10]

OR

7.

With the help of an example explain how knapsack algorithm is used for authentication?






















[10]


8.

Explain the operation PGP message generation and message reception.



[10]

OR

9.

Draw the IP security authentication header and explain the functions of each field. [10]


10.

Explain the steps involved in performing Secure Inter-branch Payment Transactions. [10]

OR

11.

List the characteristics of a good firewall implementation? How is circuit gateway
different from application gateway?











[10]




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