"""Test affine cipher keyspace
This program proves that the keyspace of the affine cipher is limited to less than len(SYMBOLS) ^ 2.
Note:
Tests every key from 2 through 80 and prints it with the encrypted message if the key and
length of SYMBOLS have a gcd.
"""
from pythontutorials.books.CrackingCodesWithPython.Chapter14.affineCipher import encryptMessage, SYMBOLS
from pythontutorials.books.CrackingCodesWithPython.Chapter13.cryptomath import gcd
[docs]def main():
message = 'Make things as simple as possible, but not simpler.'
for keyA in range(2, 80):
key = keyA * len(SYMBOLS) + 1
if gcd(keyA, len(SYMBOLS)) == 1:
print(keyA, encryptMessage(key, message))
if __name__ == '__main__':
main()