1.  
2. def genKys(length):
3.     length *= 8
4.     key = [0] * length
5.     choice = int(floor.floor(random.random() * length))
6.     for i in range(choice):
7.         key[int(floor.floor(random.random()) * (length - 1))] = 1
8.     return key
9.  
10.  
11. def enc(plain, key):
12.     length = len(key)
13.     cipher = [None] * length
14.     for i in range(length):
15.         cipher[i] = 1 if key[i] == plain[i] else 0
16.     return cipher
17.  
18.  
19. def getBts(plain):
20.     length = len(plain)
21.     bits = [None] * length * 8
22.     for i in range(length):
23.         for j in range(8):
24.             bits[8 * i + 7 - j] = (int)(ord(plain[i]) / pow(2, j)) % 2
25.     return bits
26.  
27. def getBytes(bits):
28.     length = len(bits)
29.     data = []
30.     byte = 0
31.     for i in range((int)(length / 8)):
32.         for j in range(8):
33.             byte += pow(2, 7 - j) * bits[8 * i + j]
34.         data.append(byte)
35.         byte = 0
36.     return data
37.  
38. def toString(bytes):
39.     size = len(bytes)
40.     output = ""
41.     for i in range(size):
42.         output += chr(bytes[i])
43.     return output
44.  
45. def attack(i, key, size):
46.     if i == size - 1:
47.         dec(key)
48.         return
49.     for j in range(1, size - i):
50.         attack(i + j, key, size)
51.         key2 = key[:]
52.         key2[i + j] = 1
53.         attack(i + j, key2, size)
54.  
55. def dec(key):
56.     deciphered = enc(bits, key)
57.     txt = toString(getBytes(deciphered))
58.     if isLatin(txt):
59.         if txt == plainText:
60.           print("Found!")
61.           exit()
62.  
63. def isLatin(txt):
64.     size = len(txt)
65.     for i in range(size):
66.         if (ord(txt[i]) < 97) | (ord(txt[i]) > 122):
67.             return False
68.     return True