Proposed a new hyperchaotic system, analyzed the new system, the phase diagram of the chaptic attractor, and the nature of the equilibrium point, Lyapunov exponent, nonlinear dynamics properties and so on, proposed a novel image encryption scheme based on a four dimensional hyperchaotic system. The experimental results and security analysis show that the new scheme has stronger resistance for the exhaustion attack, count attack and known-plaintext attack,and it is of high security.%提出了一个新的超混沌系统,分析了新系统的混沌吸引子相图、平衡点及其性质、Lyapunov指数等非线性动力学特性,并用该超混沌系统对图像进行加密研究.给出了一种新的基于四维超混沌系统的图像加密算法.实验结果及安全性分析表明,该算法具有较强的抵御穷举攻击、统计攻击、已知明文攻击能力,因而具有较高的安全性.
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