计算机信息的保密显得越来越重要。数据保密变换，或密码技术，是对计算机信息进行保护的最实用和最可靠的方法。现阶段计算机硬盘以及其他大容量存储介质代替了纸张成为信息存储的主要方式,随之带来的信息安全问题也日渐突出,电子文档的信息安全成为一个至关重要的问题.电子文档的安全问题发生在两个场合:动态的传输途中、静态的存储形式.对于电子文档的传输安全,可以通过数据加密技术先加密再传输、保证电子文档的合法性和完整性



要完成的工作：

1．　　对网络安全的基本概念和基本原理有一个了解。

2．　　对各种加密与解密的算法做深入的理解。

3．　　选择合适的算法编写程序。

4．　　调试程序。



这个是源代码的打包哦!

-the confidentiality of computer information are becoming increasingly important. Transform data confidentiality, or password technology, the computer information for the protection of the most practical and most reliable method. This stage of computer hard disks and other large-capacity storage medium instead of paper as the main information storage, the attendant's information security issues have become increasingly prominent, electronic document information security has become a critical issue. Electronic document security problem occurred in the two occasions : Transmission dynamics of the way, the storage form of static. for electronic document transmission security, through data encryption technology first re-transmission encryption to ensure the legality of electronic documents