A(n) _____________ is a keyless substitution cipher with N inputs and M outputs that uses a table to define the relationship between the input

A modern cipher is usually a complex _____ cipher made of a combination of different simple ciphers.

DES is a(n) _______ method adopted by the US government.

DES has an initial and final permutation block and _____ rounds.

The DES function has _____ components

DES uses a key generator to generate sixteen _____ round keys.

___________ DES was designed to increase the size of DES Key

One commonly used public-key cryptography method is the ___ algorithm

The _____ method provides a one-time session key for two parties