{publicbyte[] cipherBytes;//RC2 encrypted message textpublicbyte[] rc2Key;//RSA encrypted rc2 keypublicbyte[] rc2IV;//RC2 initialization vector}classPerson {privateRSACryptoServiceProvider rsa;privateRC2CryptoServiceProvider rc2;privatestringname;//Maximum key size for the RC2 algorithmconstintkeySize...
使用Python或C实现DES算法,以及比较DES、AES、RSA、HMAC和SHA-1算法的性能。实验室概述密码学的概念包括通过以下方式向不受信任的对等方隐藏秘密信息将消息...
安全哈希算法(Secure Hash Algorithm)主要适用于数字签名标准(Digital Signature Standard DSS)里面定义的数字签名算法(Digital Signature Algorithm DSA)。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。当接收到消息的时候,这个消息摘要可以用来验证数据的完整性。在传输的过程中,数据很可能会发生变化,那么...
1974, three days before Nixon's resignation, when IBM submitted a candidate that it had developed internally under the name LUCIFER. After evaluating the algorithm with the help of the National Security Agency (NSA), the NBS adopted a modification of the LUCIFER algorithm as the new Data Encryp...
# 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...
key = self.__permutate(des.__pc1, self.__String_to_BitList(self.getKey()))开始先用换位表生成56位的初始key值(同pc1表的位数) 之后划分成两部分self.L和self.R各28位,然后是一个循环16此的左移操作,最后用pc2换位表生成第一个子密钥Kn[0] ...
_example_des_(): from time import time # example of DES encrypting in CBC mode with the IV of "\0\0\0\0\0\0\0\0" print ("Example of DES encryption using CBC mode\n") t = time() k = des("DESCRYPT", CBC, "\0\0\0\0\0\0\0\0") data = "DES encryption algorithm" ...
Si la caractéristique ne respecte pas ces conditions (par exemple, une colonne de type chaîne avec plus de >100 valeurs uniques), elle est supprimée de notre algorithme de dérive de données, mais elle est toujours profilée. Agrandir le tableau Type de caractéristiqueType de données...
# 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 ...
#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 wi...