Information Security BS/MPhil Computer Science/MS Computer Science 6 Semester/Term University Of Sargodha (UOS) 2023

2922

University of Sargodha

BS 6% Term Examination 2023

Paper: Information Security (CMPC-302)

Subject: Computer Science

Time Allowed: 02:30 Hours

NoteP

tadni.

Masimum Marks: 80

Objective Part (Compulsory)

ustadni.com

Q.1. Write short answers of the following in 2-3 lines each on your answer sheet.

(2*16)

i. What is the purpose of change cipher specs Protocol?

il. What is the PKI?

ili.

Why is the middle portion of 3DES a decryption rather than an encryption?

iv. Which protocols are used at transport layer for providing security?

V.

Write the function of ESP protocol.

Vi.

Which types of keys can be distributed by KDC?

VIL.

What are the differences between replay and masquerade attack?

vill.

Which factors affect the size of initialization vector?

ix.

Define timing attacks

X.

When Symmetric-key cryptography is more efficient than asymmetric-key cryptography?

Xi.

What is the role of hash function in network security?

XiI.

What is a next generation firewall?

Which security services are used to avoid attacks on availability?

xiv

Why Avalanche effect is desirable property in any encryption algorithm?

Which kind of information is protected by IPSec in tunnel mode?

XVI.

What is the role Secucity Association in network layer security?

Subjective Part (4*12)

Q.2.

Q.3.

Q.4. +

0.6.

Q.7.

Explain alloük types of security services.

Wait iS malware? Give details of at least six types

Miat is message authentication? Explain authentipation functions

What is the role of VPN in laver 3 security?G

Explain public key exchange mechanists:

Give Diffic-Hellman algorithm yesh example.

ustadni.com