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 3 of 11

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Q21.

Which Authentication Encryption approach is taken by the IPSec protocol?

Authentication followed by encryption (A→E)

Hashing followed by encryption (H→E)

Encryption followed by authentication (E→A)

Independently encrypt and authenticate (E + A)

Discuss

Answer: (c).Encryption followed by authentication (E→A)

Q22.

Which Authentication Encryption approach is taken by the SSH protocol?

Hashing followed by encryption (H→E)

Encryption followed by authentication (E→A)

Authentication followed by encryption (A→E)

Independently encrypt and authenticate (E + A)

Discuss

Answer: (d).Independently encrypt and authenticate (E + A)

Q23.

Hashing followed by encryption (H→E) is used by which algorithm?

IPSec

SSH

WEP

SSL/TLS

Discuss

Answer: (c).WEP

Q24.

Which of the following terms is not an input to the CCM encryption?

Nonce.

Associated data.

Plaintext message.

Tag.

Discuss

Answer: (d).Tag.

Q25.

How many passes through the plaintext does the CCM require to generate the MAC value?

Discuss

Answer: (a).2

Q26.

In GCM, we define S as S = GHASH(A||0^v||C||0^u||[len(A)]||[len(C)]). What is v defined as?

64 ceil[len (A)/128] – len (A)

64 ceil[len (C)/128] – len (C)

128 ceil[len (A)/128] – len (A)

128 ceil[len (C)/128] – len (C)

Discuss

Answer: (c).128 ceil[len (A)/128] – len (A)

Q27.

When the length of the IV is not 96, then

we append the rest of the bits with 1*0 to make it 128 bits

we append the rest of the bits with 0*1 to make it 128 bits

we append the rest of the bits with 1*0 to make it 256 bits

we append the rest of the bits with 0s to make it 128 bits

Discuss

Answer: (d).we append the rest of the bits with 0s to make it 128 bits

Q28.

Which is not true for Key-Wrapping?

Used for small Plain Texts

It has a relatively higher throughput than other modes

It has block size of 64 bits

It has n+1 cipher blocks, for n plaintext block

Discuss

Answer: (b).It has a relatively higher throughput than other modes

Q29.

What is the value of A (0)?

F9*

A9*

A6*

F6*

Discuss

Answer: (c).A6*

Q30.

The key Wrapping Algorithm provides confidentiality and data integrity.

True

False

may be

Can't say

Discuss

Answer: (a).True

Page 3 of 11

Welcome to the Message Authentication Codes and Key Management MCQs Page

Message Authentication Codes and Key Management MCQs | Page 3 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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