A ____ substitution-based cipher replaces a character or group of characters with a different character or group of characters.
A) transposition
B) monoalphabetic
C) monotransposition
D) polytransposition

Question

Quizplus · Accepted Answer

The description given in the question is that of a monoalphabetic substitution cipher. In this type of cipher, each character is replaced with a different character from the same alphabet. For example, a substitution of each letter in the plaintext with a corresponding letter a fixed number of positions down the alphabet, such as substituting Y for A, Z for B, A for C, and so on. A transposition-based cipher rearranges the order of characters in the plaintext without changing the actual characters used. Monotransposition and polytransposition ciphers are not commonly used classification of substitution-based ciphers.

A ____ Substitution-Based Cipher Replaces a Character or Group of Characters