A novel image encryption scheme based on improved hyperchaotic sequences

A novel image encryption scheme based on improved hyperchaotic sequences
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一种基于改进超混沌序列的新型图像加密方案

DOI:
10.1016/j.optcom.2011.08.079
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发表时间:
2012
影响因子:
2.4
通讯作者:
Zhu Congxu
Zhu Congxu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Zhu Congxu

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提出了一种基于改进超混沌序列的图像加密方案。首先,对超混沌序列进行修改,生成更适合图像加密的混沌密钥流;其次,将混沌密钥流与明文进行关联,生成最终的加密密钥流,使其具有密钥敏感性和明文敏感性。该方案仅通过两轮扩散运算即可实现高密钥灵敏度和高明文灵敏度。利用直方图、相关系数、信息熵、峰值信噪比、密钥灵敏度分析、差分分析、密钥空间分析、解密质量和速度分析进行了性能测试和安全性分析。结果表明,所提出的图像加密方案安全可靠,在图像安全通信应用中具有很大的应用潜力。
This paper proposes a novel image encryption scheme based on the improved hyperchaotic sequences. Firstly, the hyperchaotic sequences are modified to generate chaotic key stream that is more suitable for image encryption. Secondly, the final encryption key stream is generated by correlating the chaotic key stream and plaintext which result in both key sensitivity and plaintext sensitivity. The scheme can achieve high key sensitivity and high plaintext sensitivity through only two rounds diffusion operation. The performance test and security analysis has been performed using the histograms, correlation coefficients, information entropy, peak signal-to-noise ratio, key sensitivity analysis, differential analysis, key space analysis, decryption quality and speed analysis. Results suggest that the proposed image encryption scheme is secure and reliable, with high potential to be adopted for the secure image communication applications.
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