实施Vignere密码
实施Vignere密码详细操作教程
在本章中，让我们了解如何实现Vignere密码。考虑文本
这是Vignere Cipher的基本实现，要对其进行编码，并且使用的键是
PIZZA。
代码
您可以使用以下代码在Python中实现Vignere密码-
# Filename : example.py
# Copyright : 2020 By Lidihuo
# Author by : www.lidihuo.com
# Date : 2020-08-28
import pyperclip
LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
def main():
myMessage = "This is basic implementation of Vignere Cipher"
myKey = 'PIZZA'
myMode = 'encrypt'
if myMode == 'encrypt':
translated = encryptMessage(myKey, myMessage)
elif myMode == 'decrypt':
translated = decryptMessage(myKey, myMessage)
print('%sed message:' % (myMode.title()))
print(translated)
print()
def encryptMessage(key, message):
return translateMessage(key, message, 'encrypt')
def decryptMessage(key, message):
return translateMessage(key, message, 'decrypt')
def translateMessage(key, message, mode):
translated = [] # stores the encrypted/decrypted message string
keyIndex = 0
key = key.upper()
for symbol in message:
num = LETTERS.find(symbol.upper())
if num != -1:
if mode == 'encrypt':
num += LETTERS.find(key[keyIndex])
elif mode == 'decrypt':
num -= LETTERS.find(key[keyIndex])
num %= len(LETTERS)
if symbol.isupper():
translated.append(LETTERS[num])
elif symbol.islower():
translated.append(LETTERS[num].lower())
keyIndex += 1
if keyIndex == len(key):
keyIndex = 0
else:
translated.append(symbol)
return ''.join(translated)
if __name__ == '__main__':
main()
输出
实现上面给出的代码时，您可以观察到以下输出-
破解Vignere密码的可能组合几乎是不可能的。因此，它被认为是一种安全的加密模式。
