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基于中国剩余定理和混沌系统的高低位图像分治加密
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Abstract:
提出了一种基于中国剩余定理(CRT)和分数阶混沌系统的高低位比特图像加密算法。通过CRT将相邻像素融合，利用高低位分割提取重要图像子带和次要图像子带，对重要子带进行DNA加密，再执行跨子带间的置乱扩散，最后再通过高低位的合并和CRT逆变换(INCRT)，将加密效果散布至全局。由于只对重要子带进行DNA加密，算法的效率得到提升。实验结果证明，算法具有良好的加密性能，能够抵御各种安全攻击。
A high and low bit image encryption algorithm based on Chinese Remainder Theorem (CRT) and fractional order chaotic system is proposed. The adjacent pixels are fused by CRT, the important image sub-band and the secondary image sub-band are extracted by high and low bit segmentation, DNA encryption is performed on the important sub-band, and then scrambling and diffusion across sub-bands are performed, and finally the combination of high and low bits is performed and INCRT, to spread the encryption effect globally. Since DNA encryption is only performed on important sub-bands, the efficiency of the algorithm is improved. And the test results prove that the algorithm has good encryption performance and can resist various security attacks.
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