message_cipher.affine_cipher module

Affine Cipher module.

This module defines the AffineCipher class, which is a concrete implementation of the Mod26Cipher class.

The AffineCipher class uses the Affine cipher algorithm for encryption and decryption.

class message_cipher.affine_cipher.AffineCipher

Bases: Mod26Cipher

Encrypt and decrypt alphabetic text using the Affine Cipher algorithm.

INVERTIBLE_ELEMENTS: Final = [1, 3, 5, 7, 9, 11, 15, 17, 19, 21, 23, 25]

__init__(degree_one: int, degree_zero: int) → None

Initialize a new Affine cipher with coefficients degree_one and degree_zero.

Parameters:

• degree_one (int) – The polynomial degree one coefficient of the Affine cipher.

• degree_zero (int) – The polynomial degree zero coefficient of the Affine cipher.

Return type:

None

message_cipher.affine_cipher.inverse_modulo_26(number: int) → int

Calculate the multiplicative inverse of number modulo 26.

Parameters:

number (int) – A number to calculate the inverse of.

Returns:

The multiplicative inverse of number.

Return type:

int