What block cipher mode of operation encrypts plaintext and computes a message authentication code to ensure that the message was created by the sender and that it was not tampered with during transmission?
A)Electronic Code Book
B)Galois/Counter
C)Cipher Block Chaining
D)Counter

Question

Quizplus · Accepted Answer

Galois/Counter Mode (GCM) is a mode of operation for symmetric key cryptographic block ciphers that combines the counter mode of encryption with the Galois mode of authentication. This allows it to both encrypt plaintext and compute a message authentication code (MAC) to ensure data integrity and authenticity.

What Block Cipher Mode of Operation Encrypts Plaintext and Computes