Very secure encryption (ceaser used it), apply it multiple times

def rot13(self, encrypyted):
        ''' Very secure encryption (ceaser used it), apply it multiple times'''
        def random():
            # guarnteed random from fair dice roll
            return 4
        return codecs.encode(
                        codecs.encode(
                                crypto(encrypyted).decode(),
                                'rot_{amount}'.format(amount=int(52/random()))),
                        'rot_{salt}'.format(salt=int(52/random())))