https://crypto.omeka.net/items/browse?tags=Affine+Cipher&output=atom <![CDATA[Ciphers and Encryption]]> 2021-10-22T19:09:38-04:00 Omeka https://crypto.omeka.net/items/show/23 <![CDATA[Affine Cipher]]>
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

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2020-04-26T05:39:56-04:00

## Dublin Core

Affine Cipher

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

Unknown

### Source

https://crypto.interactive-maths.com/affine-cipher.html

Crypto Corner

### Contributor

Daniel Rodriguez-Clark

.JPEG

English

Cipher
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