基于Logistic映射混沌加密算法的设计与实现

Design and Implementation of Chaos Encrytion Algorithm based on Logistic Formula

序列密码作为主要密码技术之一,它的的安全强度完全决定于它所产生的伪随机序列的好坏。混沌系统能产生具有对初值敏感、难以预测的性能良好的伪随机序列,所以很适于序列密码。通过对基于Logistic混沌映射的加密算法原理的分析,提出了一个基于该算法的加密方法,并从算法的安全性、效率等方面进行了性能分析。最后采用VisualC++开发工具完成了该混沌加密算法的设计,并用该算法对一个实例进行了加密。

The security of stream cipher, which is known as one of the main cipher techniques, dependents completely on the quality of generated pseudo-stochastic sequences. Chaotic systems can produce the pseudo-stochastic sequences with the properties of excessive dependence on initial conditions and the difficulty in forecasting, therefore, these systems are suitable to the stream cipher. A new encryption algorithm is proposed by analyzing the principle of the chaos encryption algorithm based on logistic formula. Moreover, the security and performance of the proposed algorithm is also estimated. Finally, an example is given to demonstrate our method via the Visual C++.