摘要
针对图像等多媒体信息的特点,提出一种结合了两种混沌映射,即基于区间数目参数化的混沌映射与标准映射的数字图像加密算法。通过基于区间数目参数化的混沌映射产生混沌实数序列,将其转化为加密需要的伪随机二值序列,然后用该伪随机序列和标准映射变换进行数字图像加密。最后从理论和数字仿真实验两方面对算法的安全性进行分析,仿真实验结果表明,该算法是一个具有较好的安全性能和抗攻击能力的混沌加密算法。
Aiming at the characters of the multimedia information such as images,a digital image encryption scheme based on chaotic map with variable intervals and standard map is proposed.Firstly,a real sequence is generated from the piecewise linear chaotic map with variable intervals and transformed into a pseudorandom binary sequence.Then,the pseudorandom sequence and the standard map are used for image encryption.Experimental tests with detailed theory analysis show,the high security and strongly against attack of the new scheme.
出处
《计算机工程与设计》
CSCD
北大核心
2010年第24期5176-5178,5247,共4页
Computer Engineering and Design
基金
重庆市教委科学技术研究基金项目(KJ061501)
