基于复合混沌序列的融合图像加密系统设计

Design of fused image encryption system based on compound chaotic sequences

运用传统系统对融合图像进行加密处理时,加密效果不理想且效率不高,为此提出一种基于复合混沌序列的融合图像加密系统设计。系统硬件主要由密钥选择模块、图像加密模块和解密处理模块组成,以此来提高系统的加密置乱稳定性。在系统硬件模块的基础上对系统的软件进行设计,在对融合图像进行加密之前,先对原始图像进行置乱预处理,并对置乱后的图像进行像素扩散处理,根据处理结果,结合复合混沌序列完成对融合图像的加密处理。实验结果表明,经所设计系统加密后的图像直方图变化更为平稳,证明图像的传输加密效果更好,同时在融合图像的加密、解密效率表现上耗时更少、效率更高。

When using traditional system to encrypt fused image,the encrypting effect is not ideal and the efficiency is not high.Therefore,a design of fused image encryption system based on compound chaotic sequence is proposed.The hardware of the system is mainly composed of key selection module, image encryption module and decryption processing module to improve the stability of encryption scrambling.Based on the hardware module,the software of the system is designed.Before encrypting the fused image,the original image is scrambled and pre-processed,and the scrambled image is processed by pixel diffusion.According to the processing results,the fused image is encrypted by combining the complex chaotic sequence.The experimental results show that the histogram of the image encrypted by the designed system changes more smoothly,which proves that the image transmission encryption effect is better,and the performance of the encryption and decryption efficiency of the fused image is less timeconsuming and more efficient.