多功能AES加密与解密软件的设计与实现  

Designing and Implementation of the Multifunction Encryption and Decryption Software

作　　者：魏嘉银[1] 

机构地区：[1]贵州大学计算机科学与信息学院,贵阳550025

出　　处：《计算机与数字工程》2011年第6期93-97,共5页Computer & Digital Engineering

基　　金：贵州省省长基金(编号:200802);贵州大学自然科学青年基金(贵大自青基合字[2009]021号);贵州大学研究生创新基金项目资助

摘　　要：文章将AES算法应用于对字符串与文件的加密与解密,并提出了"加密包"的概念。在对AES算法实现时,采用了预先计算查找表、密文挪用等技术,使该算法的运行更加快速且合理地解决了等处理数据长度不是数据块分组长度的整数倍这一特殊情形;在对文件读写的优化实现上采用了多线程、多缓冲区及内存映射文件三种技术相结合的方式,极大地提高了软件的文件读写效率。实验结果表明,该软件具有很高的运行效率且操作灵活便捷。This paper presents a method for using AES algorithm to encrypting and deciphering a string or a file.Meanwhile,the conception of ＂encryption pakage＂ is proposed.In the process of encryption,the technologies of pre-computation of the found-table,cipher message wh movement is used to develop the effectiveness of the computation and resolve the problem that the length of the data beening processed is not the multiple than that of data-block group.Multi-Threading,Multi-Buffer and Memory-Mapped-File are integrated in the reading and writing of the file,which strongly enhanced the efficiency.Experiments showed that the software is highly effective,flexible and easy to use.

关 键 词：AES算法 加密包 密文挪用 内存映射文件 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]