一种双混沌系统加密算法的设计与实现

为了使混沌加密算法具有较高安全性的同时又具有较好的运算效率,提出了基于Logistic映射、帐篷映射产生两个混沌密码序列,然后对读取的明文串进行加密的算法。采用Logistic映射和帐篷映射的复合混沌系统,其迭代过程不仅具有对初始条件的敏感性,而且具有依照复合序列选择迭代函数的灵活性,因此迭代过程还具有一定的随机性,是构造密码体系的理想工具。结果表明,该算法所产生的序列具有非常大的密钥空间,具有很好的加密强度和运算效率。

Design and Implementation of Encryption Algorithm Based on Double Chaotic System

In order to increase the security of chaos-based encryption algorithm while not affecting the performance,two chaotic secret-key sequences are generated based on the Logistic map and the tent map,which is used to encrypt text sequences.Using the compound chaos system that makes up of Logistic mapping and tent,its iterative process not only possesses sensitivity to the initial condition,but also possesses the flexibility of selection iterate function according to the multiplexed sequence,and is the ideal tool constituting the password system.The result shows that the algorithm has numerous key space,good security features and better performance.