Exemplo n.º 1
0
def euler_59():
    "Using a brute force attack, can you decrypt the cipher using XOR encryption?"
    code = tuple(int(c) for c in open('cipher1.txt').read().split(','))
    def decrypt(code, password):
        l = len(password)
        return tuple(c ^ password[i % l] for i, c in enumerate(code))
    def text(code):
        return ''.join(chr(c) for c in code)
    n = 0
    for password in selections(tuple((ord(c) for c in list('abcdefghijklmnopqrstuvwxyz'))), 3):
        c = decrypt(code, password)
        t = text(c)
        if t.find(' the ') > 0:
            print("Text:", t)
            print("Lösung:", sum(c))
            break
Exemplo n.º 2
0
from combinatorics import selections

code = tuple(int(c) for c in open('cipher1.txt').read().split(','))

def decrypt(code, password):
    l = len(password)
    return tuple(c ^ password[i % l] for i, c in enumerate(code))

def text(code): return ''.join(chr(c) for c in code)

n = 0
for password in selections(tuple((ord(c) for c in list('abcdefghijklmnopqrstuvwxyz'))), 3):
    c = decrypt(code, password)
    t = text(c)
    if t.find(' the ') > 0:
        print(sum(c))
        break