Welcome to the Message Authentication Codes and Key Management MCQs Page

Dive deep into the fascinating world of Message Authentication Codes and Key Management with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Message Authentication Codes and Key Management, a crucial aspect of Cryptography and Network Security. In this section, you will encounter a diverse range of MCQs that cover various aspects of Message Authentication Codes and Key Management, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Cryptography and Network Security.

Check out the MCQs below to embark on an enriching journey through Message Authentication Codes and Key Management. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Cryptography and Network Security.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Message Authentication Codes and Key Management. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Message Authentication Codes and Key Management MCQs | Page 8 of 11

Explore more Topics under Cryptography and Network Security

01

Cryptography Basics

02

Encryption Techniques

03

Data Encryption Standard

04

Number Theory and Finite Fields

05

Advanced Encryption Algorithm

06

Pseudorandom Number Generation and Stream Ciphers

07

Public Key Cryptography and RSA

08

Cryptographic Hash Functions

09

Network Security Concepts

10

Security in the Internet

11

Wireless Network Security

Q71.

Which is the last step in establishing a connection between hosts using the SSM?

Interaction/ Handshaking between the SSM and the KDC

Establishment of the connection

Release of connection request packet

SSM saves the packet and applies to the KDC for connection permission

Discuss

Answer: (c).Release of connection request packet

Q72.

Larger networks would prefer a full decentralization.

True

False

May be

Can't say

Discuss

Answer: (b).False

Q73.

Which of these is not a type of session key?

PIN-encrypting key

File-encrypting key

Session encrypting key

Data encrypting key

Discuss

Answer: (c).Session encrypting key

Q74.

Which session key is used for electronic funds transfer and point of sale applications?

Data-encrypting key

File-encrypting key

PIN-encrypting key

None of the mentioned

Discuss

Answer: (c).PIN-encrypting key

Q75.

Sometimes a simple tag is introduced along with the session key. This tag has 8 bits. Which of the following options is wrong?

One bit indicates whether the key is a session key or a master key

One bit indicates whether the key can be used for encryption

Three bit indicates whether the key can be used for decryption

Remaining bits are for future use

Discuss

Answer: (c).Three bit indicates whether the key can be used for decryption

Q76.

Hash Value = H = h(CV)
Key Input = Km XOR H
Ciphertext = E([Km XOR H],Ks)
What is CV here?

Cipher vector

Current vector

Control vector

None of the mentioned

Discuss

Answer: (c).Control vector

Q77.

Which is the correct representation for session key recovery for the plain text?

D ([Km XOR H], E([Km XOR H], Ks)

D([Km XOR H],Ks)

D ([Km XOR H], E([Km XOR H])

None of the mentioned

Discuss

Answer: (a).D ([Km XOR H], E([Km XOR H], Ks)

Q78.

Which of the following is required to find the session key?

i) Control Vector
ii) Master Key
iii) Encrypted session Key

i) and ii)

i) and iii)

i) ii) and iii)

Discuss

Answer: (d).i) ii) and iii)

Q79.

“Meet in the middle attack” and “man in the middle attack” are the same.

True

False

May be

Can't say

Discuss

Answer: (b).False

Q80.

“Meet in the middle attack” is an attack

where the timing required for the attack via brute force is drastically reduced

where the adversary uses 2 or more machines to decrypt thus trying to reduce the time

where messages are intercepted and then either relayed or substituted with another message

where cryptanalysis takes lesser time than the brute force decryption

Discuss

Answer: (c).where messages are intercepted and then either relayed or substituted with another message

Page 8 of 11

Welcome to the Message Authentication Codes and Key Management MCQs Page

Message Authentication Codes and Key Management MCQs | Page 8 of 11

Explore more Topics under Cryptography and Network Security

Cryptography Basics

Encryption Techniques

Data Encryption Standard

Number Theory and Finite Fields

Advanced Encryption Algorithm

Pseudorandom Number Generation and Stream Ciphers

Public Key Cryptography and RSA

Cryptographic Hash Functions

Network Security Concepts

Security in the Internet

Wireless Network Security

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