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为一个字节或字符数组或串计算md5值，内部只创建一个数组，节省分配时间，节省内存 完全是static方法，线程安全 注意对返回值的处理，见注释-for a byte array or character string or md5 value calculation, only to create an internal array, saving time allocated to save memory is completely static method, thread-safe attention to the return value, see note

删除系统某存储区中的证书， 代码参考msdn-removal system of a storage area of the certificate, a code reference VARIANT

elgamal的源程序-ElGamal

des文件加密系统。-des document cryptographic system.

VHDL implementation of the twofish cipher for 128,192 and 256 bit keys. The implementation is in library-like form All needed components up to, including the round/key schedule circuits are implemented, giving the flexibility to be combined in different architectures (iterative, rolled out/pipelined etc). Manual in English is included with more details about how to use the components and/or how to optimize some of them. All testbenches are provided (tables, variable key/text, ECB/CBC monte carlo) for 128, 192 and 256 bit key sizes, along with their respective vector files.-VHDL implementation of the twofish cipher for 128,192 and 256 bit keys. The implementation is in library-like form All needed components up to, including the round/key schedule circuits are implemented, giving the flexibility to be combined in different architectures (iterative, rolled out/pipelined etc). Manual in English is included with more details about how to use the components and/or how to optimize some

一个简单的数字签名算法的实现，能进行简单的文件签名和传送-A simple realization of a digital signature algorithm to a simple signature and send the document

Proguard是强大的Java字节码混淆器，含有源代码，可以根据自己需求修改编译。满足自身需求。 也可以作为爱好者自学的好材料。

一个简单的加密算法Kaiser(C语言实现) -A simple encryption algorithm Kaiser (C language)

动画演示aes加密的详细步骤，清晰生动，希望能对大家理解加密方法有所帮助-Animation aes encryption detailed steps, clear and vivid, hoping to help you understand the encryption method

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