Message Authentication Code

Name

Roll No

Section

MAC can be defined as:

• one-to-one mapping
• many-to-one mapping
• onto mapping
• none of the mentioned

consider a n-bit tag and a k-bit key. the estimated difficulty towards performing a brute force attack on a MAC algorithm can be given as

• 2^k
• 2^n
• min(2^k, 2^n)
• 2^k/2^n

Message Authentication code is also known as:

• testword
• checkword
• testbits
• none of the mentioned

A hash function guarantees the integrity of the message, it guarantees that the message has not be

• replace
• change
• overview
• violated

The digest created by hash function is normally called a

• modification detection code
• modify authentication connection
• message authentication control
• message authentication cipher

confidentiality and authentication is implanted in which figure:

• A
• B
• C
• D

confidentiality, authentication and signature implemented in which figure:

• A
• B
• C
• D