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摘要
In order to improve the security of digital image transmission process, and accelerate the rate of information transfer, a novel spatial-chaos-based self-adapting image encryption scheme is proposed in this paper. Firstly, to obtain corresponding scrambling image, the spatial location of pixels of a revised digital image is shuffled by using extended 2D cat map. Then, two-dimensional pseudo-random sequence is generated from the spatial-chaos system by using Logistic map as its nonlinear function, and converted to a matrix whose size is the same as the scrambling image. Besides, the scrambling image is done by a certain adaptive process. Finally, it is exploited to do XOR and module operation in the purpose of diffusion of the pixel gray value. Theoretical analysis and experimental results demonstrate that the proposed scheme has large key space, high security and speed of operation, etc. In addition, the distribution of gray value of the cipher image has random behavior.
- 出版日期2012-2
- 单位华南理工大学
