C和Java写的sepent加密算法

一种通过判断网卡地址来控制软件使用期限的算法，简单有效。-Address of a card through the control software to determine the use of time algorithms, simple and effective.

DIAMOND2加密算法的原代码-DIAMOND2 encryption algorithm source code

Motivation - A simple DES core  - Fast and Small Version  - Open Source Compatibility I believe that the core complies to NIST-800-17. However, there has been no formal third party verification. The official NIST specification can be downloaded here: 800-17.pdf. For the Triple DES, the NIST reference is located here: 

3des加密算法实现，经过FPGA验证的！-3des encryption algorithm, after FPGA validation!

JAVA开发的，使用RSA,MD5开发的简单数字签名软件，可以用来对文件和消息做数字签名。 -JAVA development, the use of RSA, MD5 developed a simple digital signature software, can be used for documents and information to do a digital signature.

加密的局域网聊天程序，采用RSA加密算法，可保证聊天的私密-Chat LAN encryption procedures, using the RSA encryption algorithm, can guarantee that the privacy Chat

DES算法实现，非常有用，对于研究加密的朋友希望回有帮助-DES algorithm, very useful for research encryption friends want to return to help

对软件进行加密限制，以防止末经诃可的随意拷贝-right software encryption restrictions to prevent the end by sending copies to be arbitrary

des加密算法源码-Sourcecode of des encrypting algorithm

ElGamal算法不仅用于数据加密也能用于数字签名，其安全性依赖于有限域上离散对数问题的计算。该方法的关键。首先，选择一个素数P，两个随机数，G和G，X，X＜P，计算Y = G ^ X（MOD P），其公钥Y，G和P的私钥X G和P的一组用户共享。ElGamal数字签名。信息签署M，先选择一个