1.  
2.  
3. def genKys(length):
4.     length *= 8
5.     key = [0] * length
6.     choice = int(floor.floor(random.random() * length))
7.     for i in range(choice):
8.         key[int(floor.floor(random.random()) * (length - 1))] = 1
9.     return key
10.  
11.  
12. def enc(plain, key):
13.     length = len(key)
14.     cipher = [None] * length
15.     for i in range(length):
16.         cipher[i] = 1 if key[i] == plain[i] else 0
17.     return cipher
18.  
19.  
20. def getBts(plain):
21.     length = len(plain)
22.     bits = [None] * length * 8
23.     for i in range(length):
24.         for j in range(8):
25.             bits[8 * i + 7 - j] = (int)(ord(plain[i]) / pow(2, j)) % 2
26.     return bits
27.  
28. def getBytes(bits):
29.     length = len(bits)
30.     data = []
31.     byte = 0
32.     for i in range((int)(length / 8)):
33.         for j in range(8):
34.             byte += pow(2, 7 - j) * bits[8 * i + j]
35.         data.append(byte)
36.         byte = 0
37.     return data
38.  
39. def toString(bytes):
40.     size = len(bytes)
41.     output = ""
42.     for i in range(size):
43.         output += chr(bytes[i])
44.     return output
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