Information Security AD/BS/MPhil Information Technology 5 Semester/Term University Of Sargodha (UOS) 2023

29840

University of Sargodha

Subject: Information Technology

BS 5th Term Examination 2023

Time Allowed: 02:30 Hours

Paper: Information Security (СМPC-303)

Maximum Marks: 60

Note: Objective part is compulsory. Attempt any three questions from subjective part.

Q.1.

vetadni. toehort answers of the following in 2

Objective Part

(Compulsory)

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

Why cyber security is required?

(2*12)

How encryption works in Asymmetric?

iv.

What is difference between passive and active security attack?

Explain the functionality of 3DES.

V.

VL.

What properties must a Hash Function have to be useful for message authentication?

vii.

Write the function of handshake protocol.

viii.

Which Protocols are used at Transport Layer for providing Security?

How Network Based Intrusion Detection works?

ix.

Define the Logic Bomb.

ustadni.com

x.

Xi.

Name some types of Social Engineering Attacks.

How to create digital signature?

xii.

How Packet Filtering Firewall Works?

Subjective Part

(3*12)

0.2.

Q.3.

Discuss the TLS according to Architecture and Protocols. What are the two main protocols of TLS?

What are the main steps of secure hash algo SHA-1?

Q.4. Discuss the following parts:

a. How Trojan Horses and Phishing work?

b. Discuss about Worms and Viruses.

c. Counter measures for Malware.

Q.5.

0.6.

Write down the steps in RSA algorithm and give an example

Perform the AES Decryption and give output of the Round 1 by using following data:

58 15 59 CD

54 73 20 67

State Matrix =

After Roundl

47 B6 D4 39

Round No 0-

68 20 4B 20

08 1C E2

DF

61 6D 75 46

8B BA E8

CE

74 79 6E 75

Round No 1=

E2 91 B1 D6

32 12 59 79

FC 91 E4 A2

F1 88 E6 93

(b) Inverse S-hox

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7C

54

08

72

60

90

09

E3

7B

2E

F8

70

бА

39

94

AI

48

AB

JE

DS

82

32

66

64

50

00

30

9B

Aб

28

86

2C

8

A

ЗА

96

47

FC

IF

60

A0

AC

F1

56

DD

74

1A

A8

7F

3B

04

41

22

71

4B

33

A9

4D

7E

8C

CA

4F

E7

1D

Co

19

AE

BA

36

2F

C2

D9

68

ED

BC

67

AD

29

D2

07

85

2A

AS

FF

23

24

98

38

87

3D

B2

16

DA

34

BE

40

8E

4C

5B

SE

15

EA

OF

02

CI

AF

DC

EA

97

F2

35

85

E2

89

6F

79

20

9A

G7

BI

OD

2D

B7

DB

12.

ES

FS

BU

26

SEL

A

A3

43

95

A2

3C

46

58

BD

GF

37

62

CO

10

TA

BB

14

9E

44

OB

49

CC

57

81

D7

03

CE

ES

0E

FE

59

9P

63

42

6D

SD

A7

01

FO

IC

AA

78

27

93

55

D

F3

DE

FA

8B

65

SD

B3

13

84

C3

DI

B6

9D

45

E6

DF

BE

SA

CD

80

53

21

99

FB

CB

4E

25

92

06

6B

73

6E

1B

FA

Ani.com

EF

61

7D

D

E

F

28

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