用混沌系统实现文本文件的加解密

Encryption and Decryption for Text Files Using Chaotic Systems

电子政务中要处理大量的电子文本文件,如何保证电子文本文件在网络传输中的安全是非常关键的。目前已经有许多传统的加密方法,本文分析了混沌系统和传统加密方法的联系,根据混沌系统对于初始值的高度敏感性,提出了将混沌系统的状态作为密钥信号对文件进行加密的一种方法,用这种方法加密,密文分布均匀,能有效提高文本的保密性,提高信息在传输中的抗破译能力。

A large number of electronic text files should be dealt with in electronic government affairs. So, how to guarantee the security of these text files transmitted in the network is becoming a vital issue. Recently, based on tra- ditional cryptology, many encryption algorithms have been reported. By analyzing the nature relationship between chaotic systems and traditional cryptology, a new algorithm is proposed, which is based on the characteristics of chaotic systems, namely, deep dependence on the initial conditions. Using the states of the chaotic systems as secret key signal, the proposed algorithm can make the resulting cipher signal uniform, and therefore, can improve the secu- rity and the ability to resist attack.