针对孙福艳等人所提出的一种基于高维混沌的图像加密算法,首先分析了原算法的缺陷,而后从安全性和效率上分别进行了改进并提出了相应的算法。理论分析和模拟实验的结果证明了改进算法在保持原算法优点的基础上能克服其缺陷,并且,最终的增强算法仅仅需要两轮就能取得一个满意的加密效果。
Concerning the high-dimension chaotic image encryption algorithm proposed by Sun et al, the authors analyzed the potential flaws and proposed corresponding improving methods in terms of security and efficiency respectively. Theoretical analysis and simulation experimental results testify that the enhancement scheme can maintain all the advantages of the original one and conquer the potential flaws. Moreover, the final scheme only needs two cncryption rounds to achieve satisfactory performance.