BCA 8th Semester
Information Security 2023 Board Question Paper

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Tribhuvan university

Bachelor In Computer Application

Course Title: Information Security

Code No: CACS 486

Semester:VIII

2023

Full Marks:60 Pass Marks:24 Time:3 hours

Candidates are required to answer the question in their own words as far as possible.

Group A
Group B
Attempt any SIX question.
[6x5=30]
2.

What is security attack? Explain different type of active attack.

3.

Find the value of 7^2019 mod 11 by using Fermat's little theorem. Define Euler totient function with example.

4.

What is Galois field? Divide 5x² + 4x + 6 by 2x + 1 over GF (7).

5.

What is digital signature? Describe approaches of DSS.

6.

What is firewall? Explain different type of firewall.

7.

What are user authentication principles? Explain about Role based and Attribute based access control.

8.

What is security audit trial? What are requirements for security auditing? Explain.

Group C

Attempt any TWO questions

[2x10=20]
9.

What is difference between block cipher and stream cipher? Encrypt and decrypt the message TRIBHUVAN UNIVERSITY with key BES using play fair and vernam cipher.

10.

How does the Kerberos authentication works? Explain the concept of trust frameworks.

11.

What is IPSec? What are benefits of IPSec? Explain the IPSec architecture in details.