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密码学程序设计---仿设密码-password procedures designed fake password---

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用C编写的100行DES加密算法，请参考-C prepared with 100 lines DES encryption algorithm, please refer to

现在很多J2EE应用都采用一个license文件来授权系统的使用，特别是在系统购买的早期，会提供有限制的license文件对系统进行限制，比如试用版有譬如IP、日期、最大用户数量的限制等。 而License文件中的Base64或BEA公司现在是WebLo

一个完整的des演示程序 ，在linux下编译通过-Des a complete demonstration of the procedures adopted in the compiler under linux

数字签名加密算法的两座大厦先后倒塌―MD5和SHA-1这两种应用最为广泛的数字签名加密算法都被山东大学的王小云教授破解。-encrypted digital signature algorithm has two buildings collapsed- MD5 and SHA-1 that the two most widely used digital signature encryption algorithm has been the Shandong University Professor Bruce Schneier break.

windows2000以上自带的加密api-dpapi的使用例子.-windows2000 above onboard encryption api- dpapi examples of the use.

用ansi C编写的DES加密实现，适合数字密码的加密。-prepared using the DES encryption and password for the encryption.

说明：  java 实现国密商密算法 包含sm2sm3sm4国密算法密钥生成，sm3withsm2国密数字签名示例(Implementing State Secret and Business Secret Algorithms in Java Including key generation of sm2sm3sm4 cryptographic algorithm, sm3withsm2 cryptographic digital signature example)

对于密码学感兴趣的读者适合，当然要求一定的基础-for cryptography for interested readers, of course, requires a certain basis