Question

A __________________, uses a block cipher in CBC mode to improve integrity. A) MAC (Message Authentication Code)

B) HMAC (Hash-based Message Authentication Code)

C) SSL (Secure Sockets Layer)

D) CBC-MAC (Cipher Block Chaining Message Authentication Code)

Answer 1

The correct answer is option D) CBC-MAC (Cipher Block Chaining Message Authentication Code). It is a method that uses a block cipher in CBC mode to improve integrity.

Step-by-step explanation:

The correct answer is option D) CBC-MAC (Cipher Block Chaining Message Authentication Code).

CBC-MAC is a method that uses a block cipher in Cipher Block Chaining (CBC) mode to improve integrity. It is commonly used in network security protocols like IPsec and TLS to ensure the integrity of transmitted data.

For example, when using CBC-MAC, the sender divides the message into blocks and encrypts each block using a secret key and the CBC mode. The final encrypted block is then used as a message authentication code to verify the integrity of the message.