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A novel image encryption scheme based on spatial chaos map |
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| Authors: | Fuyan Sun Shutang Liu Zhongqin Li Zongwang Lü |
| Institution: | aCollege of Control Science and Engineering, Shandong University, Jinan 250061, PR China bHeiLongJiang Institute of Science and Technology, Harbin 150027, PR China cInformation and Communication College, Guilin University of Electronic and Technology, Guilin 541004, PR China dCorporate Engineering Department, Johnson Electric Co. Ltd., Shenzhen 518125, PR China |
| Abstract: | In recent years, the chaos-based cryptographic algorithms have suggested some new and efficient ways to develop secure image encryption techniques, but the drawbacks of small key space and weak security in one-dimensional chaotic cryptosystems are obvious. In this paper, spatial chaos system are used for high degree security image encryption while its speed is acceptable. The proposed algorithm is described in detail. The basic idea is to encrypt the image in space with spatial chaos map pixel by pixel, and then the pixels are confused in multiple directions of space. Using this method one cycle, the image becomes indistinguishable in space due to inherent properties of spatial chaotic systems. Several experimental results, key sensitivity tests, key space analysis, and statistical analysis show that the approach for image cryptosystems provides an efficient and secure way for real time image encryption and transmission from the cryptographic viewpoint. |
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