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摘要
In this paper, a color image encryption algorithm based on chaos has been proposed. We convert the color image into three bit-level images (R, G, B components) and combine them to one bit-level image. Then, only use bit-level permutation architecture based on chaotic system to encrypt the integrated image. When diffuse the position of the integrated binary image, the value of the gray pixel is changed as well, so this architecture can achieve similar security to permutation-diffusion architecture. Besides, this architecture makes the three color components affect each other, it can reduce the correlations between three components. Simulation results show that the algorithm can encrypt the color image effectively and resist various typical attacks.
