密钥选项3:等同于DES,只有56个密钥位。这个选项提供了与DES的兼容性,因为第1和第2次DES操作相互抵消了。该选项不再为国家标准科技协会(NIST)所建议,亦不为ISO/IEC 18033-3所支持。 MD5算法: 英文名:Message Digest Algorithm V5。 中文名:消息摘要算法第五版。 算法的输入:任何长度的字节流。 算法的输出:16...
InitKeyCode=IP(text)# 产生子密钥 集合 subkeylist=createSubkey(key)# 获得Ln 和 Rn Ln=InitKeyCode[0:32]Rn=InitKeyCode[32:]# 如果是解密的过程 把子密钥数字逆过来 就变成解密过程了if(flag=="-1"):subkeylist=subkeylist[::-1]forsubkeyinsubkeylist:whilelen(Rn)<32:Rn="0"+Rnwhilelen(Ln)...
#This is a pure python implementation of the DES encryption algorithm.#It's pure python to avoid portability issues, since most DES#implementations are programmed in C (for performance reasons).# #Triple DES class is also implemented, utilising the DES base. Triple DES#is either DES-EDE3 wit...
SHA1加密 全称:安全哈希算法(Secure Hash Algorithm)主要适用于数字签名标准(Digital Signature StandardDSS)里面定义的数字签名算法(Digital Signature Algorithm DSA),SHA1比MD5的安全性更强。对于长度小于2^64位的消息,SHA1会产生一个160位的消息摘要。Python代码: importhashlib sha1 =hashlib.sha1() data =...
全称:MD5消息摘要算法(英语:MD5 Message-Digest Algorithm),一种被广泛使用的密码散列函数,可以产生出一个128位(16字节)的散列值(hash value),用于确保信息传输完整一致。md5加密算法是不可逆的,所以解密一般都是通过暴力穷举方法,通过网站的接口实现解密。Python代码: ...
# This is a pure python implementation of the DES encryption algorithm.# It's pure python to avoid portability issues, since most DES # implementations are programmed in C (for performance reasons).# # Triple DES class is also implemented, utilising the DES base. Triple DES # is either DES...
return [x ^ y for x, y in zip(t1, t2)] def generatekeys(self): # Algorithm that generates all the keys self.keys = [] key = string_to_bit_array(self.password) key = self.permut(key, CP_1) # Apply the initial permut on the key ...
### Author: Todd Whiteman# Date: 16th March, 2009# Verion: 2.0.0# License: Public Domain - free to do as you wish# Homepage: http://twhiteman.netfirms.com/des.html## This is a pure python implementation of the DES encryption algorithm.# It's pure python to avoid portability issues...
一、背景与历史 数据加密标准(Data Encryption Standard,DES)也称为数据加密算法(Data Encryption Algorithm,DEA)(ANSI)和DEA-1(ISO),是最近20年来使用的加密算法。介绍DES的细节还有两个作用:第一:介绍DES;第二,更重要的是分析和理解实际的加密算法。利用这个方法,我们还要从概念上介绍其他的加密算法,但不准备深...
python实现对称加解密3DES算法 Program : 3DES In this program, you are required to implement the 3DES algorithm using the provided encrypt...and decrypt function of DES...The encrypt and decrypt method of 3DES should also be pure functions, i.e. without side effects..., DES_Decrypt def valid...