Feistel Proposed That We Can Approximate the Ideal Block Cipher

Multiple Choice

Feistel proposed that we can approximate the ideal block cipher by utilizing the concept of a __________ cipher,which is the execution of two or more simple ciphers in sequence in such a way that the final result or product is cryptographically stronger than any of the component ciphers.

A) linear
B) permutation
C) differential
D) product