The monoalphabetic cipher family has one very important feature, namely one letter of the open alphabet corresponds. Affine cipher - encoder / decoder An affine cipher is a cipher belonging to the group of monoalphabetic substitution ciphers.
The affine cipher is a type of monoalphabetic substitution cipher, where each letter in an alphabet is mapped to its numeric equivalent, encrypted using a simple mathematical function, and converted back to a letter.The formula used means that each letter encrypts to one other letter, and back again, meaning the cipher is essentially a standard substitution cipher with a rule governing which.
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