dES

SHA-1 algorithm implemented in C.

现代密码学课设——SHA（安全哈希算法Secure Hash Algorithm）算法编程(failed to translate)

DES( Data Encryption Standard)算法，于1977年得到美国政府的正式许可，是一种用56位密钥来加密64位数据的方法。虽然56位密钥的DES算法已经风光不在,而且常有用Des加密的明文被破译的报道,但是了解一下昔日美国的标准加密算法总是有益的,而且目前DES算法得到了广泛的应用,在某些场合,她仍然发挥着余热.（如：UNIX的密码算法就是以DES算法为基础的）。将其修改为三重DES也能抵抗破解。下面是关于如何实现DES算法的语言性描述：(DES ( Data Encryption Standard ) algorithm, in 1977 the U.S. government s official permission , is a 56 -bit key to encrypt 64 data . 56 keys of the DES algorithm scenery is not , and often with Des encryption expressly decipher reported , but look at the old standard encryption algorithm is always useful , but the DES algorithm has been widely used in a some occasions , she still plays a waste heat . (such as : UNIX password algorithm is DES algorithm -based ) . To modify the Triple DES is also resistant to cracking . The following is a description language on how to achieve the DES algorithm : )

DES加密算法，初始置换、密钥置换、密钥循环、密钥压缩置换、数据扩展置换、、S盒替换、P盒置换、末置换 (DES encryption algorithm, the initial replacement, key replacement, key loops, key compression replacement, data expansion permutation,, S cartridge replacement, P cartridge replacement, replacement end)

VC++下MD5运行和使用示例,可以正常使用MD5算法(VC MD5)

IBE基于身份的加密系统的身份提取程序，使用VC6.0开发，即把身份转换成椭圆曲线上的点(IBE identity-based encryption system of the identity of extraction procedures, using VC6.0 development, namely, the identity into a point on the elliptic curve)

壳代码，对于学习壳编写的同学具有一定的参考价值，绝对经典(Shell code, written for students to learn the shell has a certain reference value, an absolute classic)

ras加密实现,图形界面.源码附有注释，方便理解。欢迎下载(ras encryption to achieve, graphical interface. annotated source code to facilitate understanding. Welcome to download)

基于RSA算法的加密解密以及数字签名系统，实现加密解密签名的功能(RSA-based encryption and decryption algorithms and digital signature system to achieve the function of signature encryption and decryption )

DES加密的雪崩效应分析，按照作业要求做的。(DES encryption of the avalanche effect analysis, done in accordance with operational requirements.)