Question

___________ was invented by a team of cryptographers including Vincent Rijmen, Joan Daemen, Bart Preneel, Antoon Bosselaers, and Erik De Win. It uses a 64-bit block with a 128-bit key and operates in six rounds. A) Serpent

B) Blowfish

C) CAST-128

D) Camellia

Answer 1

CAST-128, also known as CAST5, fits the description of the encryption algorithm with a 64-bit block, a 128-bit key, and six rounds of operation, making it the correct answer - option C.

Step-by-step explanation:

The encryption algorithm invented by a team of cryptographers including Vincent Rijmen, Joan Daemen, Bart Preneel, Antoon Bosselaers, and Erik De Win that uses a 64-bit block with a 128-bit key and operates in six rounds is C) CAST-128.

CAST-128, also known as CAST5, is a symmetric key block cipher noted for its simplicity and efficiency. It was selected as one of the algorithms to be used in the IETF's OpenPGP standard. Although other ciphers like Serpent, Blowfish, and Camellia also play significant roles in the field of cryptography, CAST-128 specifically fits the description given in the question due to its block size, key size, and number of rounds.