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 2 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

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Security in the Internet

11

Wireless Network Security

Q11.

MACs are also called

testword

checkword

testbits

none of the mentioned

Discuss

Answer: (d).none of the mentioned

Q12.

For a 100 bit key and a 32 bit tag, how many possible keys can be produced in the 3rd round?

2^4

2^32

2^16

2^64

Discuss

Answer: (a).2^4

Q13.

MAC is a

one-to-one mapping

many-to-one mapping

onto mapping

none of the mentioned

Discuss

Answer: (b).many-to-one mapping

Q14.

For an n-bit tag and a k-bit key, the level of effort required for brute force attack on a MAC algorithm is

2^k

2^n

min(2^k,2^n)

2^k/2^n

Discuss

Answer: (c).min(2^k,2^n)

Q15.

Cryptographic hash functions execute faster in software than block ciphers.

Statement is correct

Statement is incorrect

Depends on the hash function

Depends on the processor

Discuss

Answer: (d).Depends on the processor

Q16.

What is the value of ipad in the HMAC structure?

00111110

00110010

10110110

01110110

Discuss

Answer: (b).00110010

Q17.

What is the value of opad in the HMAC structure?

00111110

00110010

10110110

01011100

Discuss

Answer: (d).01011100

Q18.

Which cryptographic algorithm is used in CMAC?

Triple DES and AES

DES

RC-4

AES

Discuss

Answer: (a).Triple DES and AES

Q19.

In CMAC, which scenario is a different key K2 is used instead of K1?

If the tag is larger than the key length

If the tag is shorter than the key length

In the last step of the algorithm

If the plaintext/message is not an integer multiple of the cipher clock length

Discuss

Answer: (d).If the plaintext/message is not an integer multiple of the cipher clock length

Q20.

Which Authentication Encryption approach is taken by the SSL/TLS 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: (c).Authentication followed by encryption (A→E)

Page 2 of 11

Welcome to the Message Authentication Codes and Key Management MCQs Page

Message Authentication Codes and Key Management MCQs | Page 2 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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