This repository contains a simple implementation of the Bifid Cipher.

Create a BifidCipher object. You can create it using a predefined Polybius square, or you can generate one by default by leaving the variable empty.

from BifidCipher import BifidCipher

cipher = BifidCipher()
encrypted = cipher.encrypt_message('testing hello')

>>> cipher.decrypt_message(encrypted)
QTIXTMFNHVND

Additionally, you can supply a period/block size for the BifidCipher in the constructor.

from BifidCipher import BifidCipher

cipher = BifidCipher('ABCDEFGHIJKLMNOPQRSTUVWXYZ', period=3)
encrypted = cipher.encrypt_message('testing hello')