from ngramscore import NGramScore
alphabet = alphabets.GERMAN
fitness = NGramScore('freq/de-2.txt')
cipher = Caesar()
def crack(ctext):
max_score = 0
key = 0
for i in range(0, len(alphabet)):
dec = cipher.decrypt(ctext, i, alphabet)
score = fitness.score(dec)
print("key = " + str(i) + ", decrypted text: " + str(dec.upper()) + ", score: " + str(score))
if score > max_score:
max_score = score
key = i
return key
# example ciphertext
enc = 'äbööemökglbgäßnm'
print("encrypted text: " + enc)
print()
key = crack(enc)
print()
print('best key = ' + str(key) + ':')
print(cipher.decrypt(enc, key, alphabet).upper())
#!/usr/bin/python
# -*- encoding: utf-8 -*-
from secretpy import Caesar
from secretpy import alphabets
alphabet = alphabets.GERMAN
plaintext = u"thequickbrownfoxjumpsoverthelazydog"
key = 3
cipher = Caesar()
print(plaintext)
enc = cipher.encrypt(plaintext, key, alphabet)
print(enc)
dec = cipher.decrypt(enc, key, alphabet)
print(dec)
print('=====================================')
print(plaintext)
# use default english alphabet
enc = cipher.encrypt(plaintext, key)
print(enc)
dec = cipher.decrypt(enc, key)
print(dec)
'''
Output:
thequickbrownfoxjumpsoverthelazydog
wkhtxlfneurzqirämxpsvryhuwkhodüögrj
thequickbrownfoxjumpsoverthelazydog