adplus-dvertising
frame-decoration

Question

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

a.

If the tag is larger than the key length

b.

If the tag is shorter than the key length

c.

In the last step of the algorithm

d.

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

Posted under Message Authentication Codes and Key Management Cryptography and Network Security

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

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. In CMAC, which scenario is a different key K2 is used instead of K1?
Add Comment

Similar Questions

Discover Related MCQs

Q. Which Authentication Encryption approach is taken by the SSL/TLS protocol?

View solution

Q. Which Authentication Encryption approach is taken by the IPSec protocol?

View solution

Q. Which Authentication Encryption approach is taken by the SSH protocol?

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. When the length of the IV is not 96, then

View solution

Q. Which is not true for Key-Wrapping?

View solution

Q. What is the value of A (0)?

View solution

Q. The key Wrapping Algorithm provides confidentiality and data integrity.

View solution

Q. Which of the following is not true for whirlpool hashing function?

View solution

Q. The expected workload of generating a collision is of the order of ____________ executions of Whirlpool.

View solution

Q. Given a message, the expected workload of finding a message that hashes to that value is of the order ____________

View solution

Q. Given a message and its n-bit hash result, the expected workload of finding a message that hashes to the same value is of the order _______________

View solution

Q. The message is padded to

View solution

Q. The length of the message is appended to the message. What is the size of this length?

View solution

Q. The hash matrix is of the size

View solution

Q. The 8 × 8 hash matrix holds values of size

View solution

Q. The hash matrix of 8 × 8 is preferred over a 16 × 4 matrix because

View solution
View All MCQs on Message Authentication Codes and Key Management

Suggested Topics

Are you eager to expand your knowledge beyond Cryptography and Network Security? We've curated a selection of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!

Microprocessor

Understand the heart of your computer with our Microprocessor MCQs. Topics include...

IT Fundamentals

Navigate the basics of information technology with our IT Fundamentals MCQs. Get a...

Data Science

Discover the fascinating world of extracting insights from data with our Data Science...

MS Office

Master the suite of productivity tools with our MS Office MCQs. From Word and Excel...

PHP

Venture into server-side scripting with our PHP MCQs. Cover everything from syntax...

UNIX

Become proficient with the Unix operating system using our UNIX MCQs. Learn about...

Web Technologies

Master the building blocks of the web with our Web Technologies MCQs. From HTML and...

Hadoop

Dive into the world of big data with our Hadoop MCQs. Cover key concepts including...

Computer Graphics

Step into the visual side of computing with our Computer Graphics MCQs. Cover topics...