结合DNA编码的快速混沌图像加密算法

针对现有图像加密算法的加密、解密速度问题，提出了一种与DNA编码相结合的快速图像加密算法，采用新4维混沌系统产生的混沌序列作为索引序列，指明置乱过程中要交换的具体位置.对置乱后的图像进行DNA编码，采用规则1的DNA加法法则和DNA异或法则完成扩散过程后，再用不同的规则进行DNA解码，从而完成二次加密.实验结果表明:本文提出的方法在保证图像加密系统安全的同时，减少了置乱过程中循环遍历的次数，从而提升了加密和解密的速度.

Fast Chaotic Image Encryption Algorithm Combined with DNA Encoding

Aiming at the speed of encryption and decryption of existing image encryption algorithms， a fast image encryption algorithm combined with DNA encoding is proposed using the chaotic sequence generated by the new 4-D chaotic system as the index sequence to indicate the specific position to be exchanged during the permutation process. DNA encoding is performed on the permuted image， and the diffusion process is completed by the DNA addition and DNA XOR of rule 1， then different rules are used for DNA decoding to complete the secondary encryption.The experimental results show that the proposed method reduces the number of loop traversals of permutation process while ensuring the security of the image encryption system， thereby increasing the speed of encryption and decryption.