Affine Cipher
Dublin Core
Title
Affine Cipher
Subject
Affine Cipher
Description
The Affine Cipher is a form of substitution cipher that involves math. The shift of the alphabet- while transpositioning plaintext into ciphertext is determined by a mathematical equation. This equation is:
E(x) = (ax+b) mod m
E(x) = The number equaling the letter to be used in the cipher text
a, b = Any given number
x = the number correlating to the plaintext letter
mod m = A mathematical way (subtraction, division, etc.) to bring (ax+b) back within range of 26 for all answers.
To decrypt, the equation is c(x-b) mod m.
c = the modular multiplicative inverse of a
E(x) = (ax+b) mod m
E(x) = The number equaling the letter to be used in the cipher text
a, b = Any given number
x = the number correlating to the plaintext letter
mod m = A mathematical way (subtraction, division, etc.) to bring (ax+b) back within range of 26 for all answers.
To decrypt, the equation is c(x-b) mod m.
c = the modular multiplicative inverse of a
Creator
Unknown
Source
https://crypto.interactive-maths.com/affine-cipher.html
Publisher
Crypto Corner
Contributor
Daniel Rodriguez-Clark
Format
.JPEG
Language
English
Still Image Item Type Metadata
Original Format
Cipher
Collection
Citation
Unknown, “Affine Cipher,” Ciphers and Encryption, accessed April 26, 2024, https://crypto.omeka.net/items/show/23.