Exam Details
| Subject | information security | |
| Paper | ||
| Exam / Course | computer science and engineering | |
| Department | ||
| Organization | Vardhaman College Of Engineering | |
| Position | ||
| Exam Date | May, 2018 | |
| City, State | telangana, hyderabad |
Question Paper
VARDHAMAN COLLEGE OF ENGINEERING
(AUTONOMOUS)
B. Tech VI Semester Regular Examinations, May 2018
(Regulations: VCE-R15)
INFORMATION SECURITY
(Common to Computer Science and Engineering Information Technology)
Date: 14 May, 2018 FN Time: 3 hours Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
Unit I
1. Account on the following:
i. Different techniques used in steganography
ii. Essential ingredients of symmetric cipher
10M
Analyze the various types of cryptanalytic attacks based on the amount of information
known to the cryptanalyst.
5M
2. Consider an automated teller machine in which users provide a personal
identification number and a card for account access. Give examples of
confidentiality, integrity and availability requirements associated with the system.
6M
Show your calculations and the result to encrypt the message "SHORT EXAMPLE"
using the Hill Cipher with the key
9M
Unit II
3. Show that the inverse of 5 modulo 101 is 599. 7M
Explain AES structure with a neat diagram.
8M
4. What is triple encryption? How many keys are used in triple encryption? 5M
Find the two smallest positive integer solutions to the following system of
equivalences:
i. x ≡ 2 (mod
ii. x ≡ 5 (mod
iii. x ≡ 4 (mod 37)
10M
Unit III
5. Explain Diffie-Hellman key Exchange with an example. 8M
Explain the working of HMAC algorithm with neat diagram.
7M
6. Explain Message Authentication Code for authentication tied to plaintext and
authentication tied to ciphertext with a neat diagram.
8M
In a public-key system using RSA, you intercept the ciphertext C=10 sent to a user
whose public key is n=35. What is the plaintext Write the corresponding
pseudocode.
7M
Unit IV
7. Give examples of applications of IPSec. What services are provided by IPSec? 7M
Discuss briefly about the X.509 certificate format.
8M
8. Why is R64 conversion useful for an e-mail application? Explain in detail. 7M
What four requirements were defined for Kerberos?
8M
Unit V
9.
a)With the help of the timing diagram explain the various messages exchanged between client and server in handshake protocol.
9M
b)What is the difference between an SSL connection and an SSL session?
6M
10.
a)Explain the role of trusted systems in enforcing security.
8M
b)What is the difference between a packet-filtering router and a stateful inspection firewall?
(AUTONOMOUS)
B. Tech VI Semester Regular Examinations, May 2018
(Regulations: VCE-R15)
INFORMATION SECURITY
(Common to Computer Science and Engineering Information Technology)
Date: 14 May, 2018 FN Time: 3 hours Max Marks: 75
Answer ONE question from each Unit
All Questions Carry Equal Marks
Unit I
1. Account on the following:
i. Different techniques used in steganography
ii. Essential ingredients of symmetric cipher
10M
Analyze the various types of cryptanalytic attacks based on the amount of information
known to the cryptanalyst.
5M
2. Consider an automated teller machine in which users provide a personal
identification number and a card for account access. Give examples of
confidentiality, integrity and availability requirements associated with the system.
6M
Show your calculations and the result to encrypt the message "SHORT EXAMPLE"
using the Hill Cipher with the key
9M
Unit II
3. Show that the inverse of 5 modulo 101 is 599. 7M
Explain AES structure with a neat diagram.
8M
4. What is triple encryption? How many keys are used in triple encryption? 5M
Find the two smallest positive integer solutions to the following system of
equivalences:
i. x ≡ 2 (mod
ii. x ≡ 5 (mod
iii. x ≡ 4 (mod 37)
10M
Unit III
5. Explain Diffie-Hellman key Exchange with an example. 8M
Explain the working of HMAC algorithm with neat diagram.
7M
6. Explain Message Authentication Code for authentication tied to plaintext and
authentication tied to ciphertext with a neat diagram.
8M
In a public-key system using RSA, you intercept the ciphertext C=10 sent to a user
whose public key is n=35. What is the plaintext Write the corresponding
pseudocode.
7M
Unit IV
7. Give examples of applications of IPSec. What services are provided by IPSec? 7M
Discuss briefly about the X.509 certificate format.
8M
8. Why is R64 conversion useful for an e-mail application? Explain in detail. 7M
What four requirements were defined for Kerberos?
8M
Unit V
9.
a)With the help of the timing diagram explain the various messages exchanged between client and server in handshake protocol.
9M
b)What is the difference between an SSL connection and an SSL session?
6M
10.
a)Explain the role of trusted systems in enforcing security.
8M
b)What is the difference between a packet-filtering router and a stateful inspection firewall?
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