凯撒密码python实现
2022/1/10 17:03:54
本文主要是介绍凯撒密码python实现,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
""" @description: 凯撒密码 @time: 2021-12-03 @version: python3.9.6 """ def CaesarEncode(crypto_str, shift): """ 凯撒加密 :param crypto_str: 要加密的明文 :param shift: 偏移量 :return: 返回加密后的密文 """ result = "" num = int(shift) for word in crypto_str: ch = ord(word) if ord('a') <= ch <= ord('z'): ch = (ch + num) % 26 if ord('A') <= ch <= ord('Z'): ch = (ch + num) % 26 result += chr(ch) return result def CaesarDecode(crypto_str, shift): """ 凯撒解密 :param crypto_str: 要解密的密文 :param shift: 偏移量 :return: 返回解密后问明文 """ result = "" num = int(shift) for word in crypto_str: ch = ord(word) if ord('a') <= ch <= ord('z'): ch -= num if ch < ord('a'): ch += 26 if ord('A') <= ch <= ord('Z'): ch -= num if ch < ord('A'): ch += 26 result += chr(ch) return result if __name__ == '__main__': shift = 1 # 偏移量 str = "oknqdbqmoq{kag_tmhq_xqmdzqp_omqemd_qzodkbfuaz}" # 文本 #解密 for i in range(1, 26): print(i, ":", CaesarDecode(str, shift)) str = CaesarDecode(str, shift) #加密 # print(CaesarEncode(str,shift))
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