A substitution cipher is a kind of cipher that takes one character and replaces it with another character, working one character at a time.
A substitution cipher is a data encryption scheme where units of the plaintext, generally single letters or pairs of letters of ordinary text, are replaced with other symbols or groups of symbols. It means that a substitution cipher substitutes different numbers, letters, or other characters for each character in the original text. The simple example is a simplistic substitution whereby each letter of the alphabet is represented by a numerical value, starting with 1 for A.
You can leran more about substitution cipher at
https://brainly.com/question/28021345
#SPJ4
