Python实现的维尼吉亚密码算法示例

# -*- coding:utf-8 -*-#key='relations'#plaintext='tomorrowiwillhaveagood'print("武林网测试结果：")key='helloworld'plaintext=raw_input('请输入明文：')ascii='abcdefghijklmnopqrstuvwxyz'keylen=len(key)ptlen=len(plaintext)ciphertext =''i =0while i < ptlen: j = i % keylen k = ascii.index(key[j]) m = ascii.index(plaintext[i]) ciphertext += ascii[(m+k)%26] i +=1print(ciphertext)#维吉尼亚加密算法 解密key='helloworld'ciphertext=raw_input('请输入密文：')ascii='abcdefghijklmnopqrstuvwxyz'keylen=len(key)ctlen=len(ciphertext)plaintext =''i =0while i < ctlen: j = i % keylen k = ascii.index(key[j]) m = ascii.index(ciphertext[i]) if m < k:  m +=26 plaintext += ascii[m-k] i +=1print(plaintext)