DES加密是三大著名且经典的加密算法之一,为分组对称加密算法。DES算法(或国产等效算法)在POS、ATM、磁卡及智能卡(IC卡)、加油站、高速公路收费站等领域被广泛应用,以此来实现关键数据的保密,如信用卡持卡人的PIN的加密传输,IC卡与POS间的双向认证、金融交易数据包的MAC(消息鉴别码Message Authentication Code)校验等。
# 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 ...
[::-1] for subkey in subkeylist: while len(Rn) < 32: Rn = "0" + Rn while len(Ln) < 32: Ln = "0" + Ln # 对右边进行E-扩展Rn_expand = E_expend(Rn) # 压缩后的密钥与扩展分组异或以后得到48位的数据,将这个数据送入S盒S_Input = int(Rn_expand, base=2) ^ int(subkey, ...
/usr/bin/env python#-*-coding:UTF-8-*-#2014/10/16wrote by yangyongzhen #QQ:534117529# global definition # base=[0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F]__author__='YangYongZhen'base=[str(x)forxinrange(10)]+[chr(x)forxinrange(ord('A'),ord('A')+6)]# bin2dec # 二进...
priKey = RSA.importKey(private_keyBytes)# priKey = RSA.importKey(privateKey)signer = PKCS1_v1_5.new(priKey,)# SIGNATURE_ALGORITHM = "MD5withRSA"# hash_obj = MD5.new(data.encode('utf-8'))# SIGNATURE_ALGORITHM = "SHA1withRSA"hash_obj = SHA1.new(data.encode('utf-8'))# SIGNATU...
MD5(Message-Digest Algorithm 5)是一种广泛使用的哈希函数,用于生成数据的摘要信息。然而,MD5算法存在严重的安全漏洞,容易受到碰撞攻击和预测攻击。这意味着攻击者可以通过构造特定的输入数据,使MD5输出相同的摘要信息,从而实现伪造数据或篡改数据的目的。因此,MD5已经不再被认为是安全的哈希函数。
### 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...
The DES Algorithm is a block cipher that uses symmetric keys to convert 64-bit plaintext blocks into 48-bit ciphertext blocks. The (DES) Data Encryption Standard Algorithm was developed by the IBM team in the 1970s. It has since been accepted by the National Institute of Standards and ...
全称:MD5消息摘要算法(英语:MD5 Message-DigestAlgorithm),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(hashvalue),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: ...
Code Issues Pull requests [CourseProject] 密码学:C语言实现DES和AES算法;Python实现RSA加密。Cryptography: DES and AES algorithms implemented with C; RSA implemented with Python. cryptography algorithm aes rsa reports des Updated Aug 25, 2023 C rockcarry / sngen Star 8 Code Issues Pul...