DES 实现 包括 纯DES 3DES 和 CBC

多数程序设计语言处理整数的能力是有限的，如C语言中，int类型数据范围是-32767----32767。实际问题的处理过程中往往涉及大整数的运算，如RSA加密算法要求至少64bit的整数，本程序是设计算法实现大整数的加减运算。-majority programming language processing is integral to the limited capacity, such as C language, int data type is the scope-32767---- 32767. Practical problems of the treatment process often involves large integer arithmetic, such as the RSA encryption algorithm requires at least 64-bit integers, the procedure is designed algorithm large integer addition and subtraction operations.

如何对一个已有字符串加密-how to have a string encryption

数据加密技术之几种算法 sa-faq-1-data encryption technology several algorithms rsa- faq-1

这是一个混合密码系统，利用多种方式加密-This is a mixed-code system and a variety of forms of encryption

des加密　ElGamal算法既能用于数据加密也能用于数字签名，其安全性依赖于计算有限域上离散对数这一难题。 　　密钥对产生办法。首先选择一个素数p，两个随机数, g 和x，g, x

Dr.Sec高速密码算法库Windows版-Dr.Sec high-speed cryptographic algorithm for Windows version

数字电视中的加密-Encryption of digital TV

C和Java写的sepent加密算法-C and Java write sepent encryption algorithm

java ecc java ecc java e-java eccjava eccjava eccjava eccjava ecc

base64加密算法源代码，比如现在的qq采样双层加密，其中外层加密就采用此算法-base64 encryption algorithm source code, such as the current two-tier encryption qq sampling, in which outer layer of encryption on the use of this algorithm