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Gujarat Technological University

This document appears to be an exam for a course on Information Security. It contains 5 questions assessing students' knowledge of various topics in information security. Question 1 asks about types of computer system attacks and security mechanisms. Question 2 focuses on conventional security models and cryptanalysis techniques. Question 3 compares public and private key cryptography and discusses algorithms for each, or covers digital signatures and the Playfair cipher. Question 4 examines limitations of the DES algorithm and key management techniques, or covers the RSA algorithm and web security. Question 5 requires short written responses on topics like PGP, Kerberos, Hill cipher, elliptic curve cryptography, Diffie-Hellman key exchange, and message authentication codes.

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Shweta Jha
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78 views1 page

Gujarat Technological University

This document appears to be an exam for a course on Information Security. It contains 5 questions assessing students' knowledge of various topics in information security. Question 1 asks about types of computer system attacks and security mechanisms. Question 2 focuses on conventional security models and cryptanalysis techniques. Question 3 compares public and private key cryptography and discusses algorithms for each, or covers digital signatures and the Playfair cipher. Question 4 examines limitations of the DES algorithm and key management techniques, or covers the RSA algorithm and web security. Question 5 requires short written responses on topics like PGP, Kerberos, Hill cipher, elliptic curve cryptography, Diffie-Hellman key exchange, and message authentication codes.

Uploaded by

Shweta Jha
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Seat No.: ________ Enrolment No.

___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER–VI • EXAMINATION – SUMMER • 2014
Subject Code: 160702 Date: 21-05-2014
Subject Name: Information Security
Time: 10:30 am - 01:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Explain various types of attack on computer system. 07


(b) What is security mechanism? List and explain various security mechanism. 07

Q.2 (a) Explain the conventional security model used for information security. 07
(b) Explain cryptanalysis. Discuss any one technique for it 07
OR
(b) What attacks can be done on encrypted text? Explain them. 07

Q.3 (a) Compare public key and private key cryptography. Also list various algorithms for each. 07
(b) With the help of example explain how can we find out GCD of two numbers using 07
Euclid algorithm
OR
Q.3 (a) What is digital signature? Explain its use with the help of example.
(b) Explain play fair cipher with suitable example.

Q.4 (a) Explain limitation of DES in detail. 07


(b) List and Explain various key management techniques. 07
OR
Q.4 (a) Explain RSA algorithm 07
(b) How can we achieve web security? Explain with example. 07

Q.5 Write a note on followings (Any 4) 14


(a) Pretty Good Privacy
(b) Kerberos
(c) Hill cipher
(d) Elliptic curve cryptography
(e) Diffi hellman key exchange.
(f) Message Authentication code

***************

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