des加密，必须是8位英文字符，或4位中文字符

首先，RC4算法生成一个“状态”，这开始为包含在订单值0-255的数组。然后该算法通过阵列迭代和周围交换的元素，基于所述键值。原始密钥然后可被丢弃，因为RC4只使用状态来创建一个伪随机密钥流，由算法选择的元素和吐出出来。密钥流的所述状态单靠额外的好处是，原来的密钥并不需要被保存在内存中。算法初始化状态。执行密钥调度算法（KSA）上的状态下，根据所输入的键（然后其可以被丢弃）。在算法选择（现炒）的状态，并将其输出作为密钥流元素。

数据加密算法，很好的东东，下了试试看就知道了。-Data encryption algorithm, a very good Dongdong, a try to know.

一些加密算法的介绍,可对文件或字符串加密-some encryption algorithm, the right documents can be encrypted or string

这是一个霍夫曼编码程序-This is a Huffman code program

这是一个好用的MD5的C++类；这个类可以加在控制台 程序中也可用在MFC中， 并且提供了详细的错误处理 函数，是一个安全的类。例程是一个MD5的MFC程序， 支持字符串和文件两种输入。-This is an easy to use the MD5 of the C++ Category this category can be added to the console program can also be used in MFC, and it provides a detailed error handling function, is a safe type. MD5 is a routine procedure of MFC to support the two input strings and documents.

用C语言求解经典逻辑推理题-Solving with C language that classical logic

本书真实系统地介绍了密码学及该领域全面的参考文献。 全书共分四个部分，首先定义了密码学的多个术语，介绍了密码学的发展及背景，描述了密码学从简单到复杂的各种协议，详细讨论了密码技术，并在此基础上列举了如DES、IDEA、RSA、DSA等10多个算法以及多个应用实例，并提供了算法的源代代码清单。 全书内容广博权威，具有极大的实用价值。自出版以来，得到业内专家的高度赞誉，是致力于密码学研究的专业及非专业人员一本难得的好书。-This book introduces the real system and the field of cryptography comprehensive references. Book is divided into four parts, first of all define the term more than cryptography, introduced the development of cryptography and background, describes cryptography from the simple to the complex variety of the agreement, a detailed discussion of cryptographic techniques, and on this basis cited, such as DES, IDEA, RSA, DSA algorithm, as well as more than 10 examples of multiple applications and provides the algorithm source code on behalf of the list. Broad authority of the contents of the book, has great practical value. Self-publishing has been highly praised the industry experts, is dedicated to the study of cryptography professional and non-professional a rare book.

CRC32哈希算法的C#版源码．采用的是动态生成码表的方法．-CRC32-hash algorithm in C# version of the source code. The code is dynamically generated table method.

这个是基于混沌的DES加密算法应用与图象加密-Chaos DES encryption algorithm and the application of image encryption

AES应用的一些相关列子,同样需要库的支持-AES Liezi some applications, also need the support of the Treasury