密码学文献有一个奇妙的发展历程，当然，密而不宣总是扮演主要角色。第一次世界大战前，重要的密码学进展很少出现在公开文献中，但该领域却和其它专业学科一样向前发展。-cryptography literature has a wonderful history, of course, close does not declare always played the leading role. Before the First World War, it was important to cryptography little progress emerged in the open literature. However, the area has other professional disciplines and the development of the same.

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CRC循环冗余检测，CRC32的一个检测实例-CRC cyclic redundancy test, CRC32 instance of a test

Fast CRC Algorithmes develop in Delphi. Simple to uses and very fast to run

差分密码分析，此实验是对S-P密码体制的差分分析-differential cryptanalysis, the experiment of S-P Cryptosystem Differential Analysis

3重DES算法是加密标准的过渡算法，现阶段在各个加密领域仍有较广泛的应用，本文件用c语言实现了3重DES的加密算法，包含了加解密过程的所有算法，对学习信息安全的人员有较好的参考价值！

用C语言实现的RSA算法，各个部分模块，都有详细介绍。密钥生成、大素数产生、素数判断、参数的选取，都有，用C语言实现的RSA算法。

sip中的md5测试源码,可以进行md5加密认证的-MD5 test source code in sip which can be used to implement MD5 encryption and authentation

详细介绍了DES和RSA2算法描述,以及他们的实现的有关代码和他们的区别-detail and the DES algorithm RSA2 described, as well as their realization of the code and the difference between them

计算机安全的一本很好的书,其中有关安全密要等重要的内容,是一本不错的书-computer security,an introduction to computer security,you can learn much from it , a very good book