Python凯撒密码函数

Question

我想编写一个python函数，该功能会自动找到任何加密文本的键并解密文本。我想使用Caesar Cipher加密算法。

此代码是这样，您将输入腐烂，但我希望代码能够自动找到腐烂。

import string
from time import sleep

alphabet = string.ascii_lowercase # "abcdefghijklmnopqrstuvwxyz"

def decrypt(text, rot):
    
    decrypted_text = "" 
    ct = open("rfc8446.txt", "r")

    for cipher in text:

        if cipher in alphabet:  # check if character is an alphabet
            
            position = alphabet.find(cipher) # find the index position of each text 
               
            new_position = (position - rot) % 25 # find the new index position to decrypt
            
            new_character = alphabet[new_position] # 
            decrypted_text += new_character
        else:
            decrypted_text += cipher

    print(decrypted_text)
text = "hnbcnamjh vh krtn unoc vn knqrwm"
rot = 7
decrypt(text, rot)

Answer 1

只需通过循环循环循环，这将为您提供所有可能的解决方案。

import string
from time import sleep


def decrypt(text):
    for rot in range(26):
        alphabet = string.ascii_lowercase # "abcdefghijklmnopqrstuvwxyz"
        decrypted_text = ""
        for cipher in text:
            if cipher in alphabet:
                position = alphabet.find(cipher)
                new_position = (position - rot) % 25
                new_character = alphabet[new_position]
                decrypted_text += new_character
            else:
                decrypted_text += cipher
        print(decrypted_text)


text = "hnbcnamjh vh krtn unoc vn knqrwm"
decrypt(text)

但是，找到好的是更复杂的，因为您需要使用文本合理性矩阵之类的东西来识别哪种“外观”英语“看起来”英语