Double color images encryption based on DNA sequences and block permutation
Kunshu Wang, Xiangjun Wu, Baoqiang Liu · 2017
In this paper, we propose a double color images encryption scheme based on Deoxyribonucleic Acid (DNA) sequence, chaotic system and block permutation.Mean Square Error (MSE) of the double images, LSS and 2D-LASM chaotic systems are firstly employed to generate the key streams.Then, divide the plain-images into equal blocks and scramble the blocks using the key streams.Next, encode the permuted images into the DNA matrices according to the DNA encoding rules and a DNA XOR operation is carried out on the DNA matrices.Finally, decode the encrypted the DNA matrices via the DNA decoding rules, and a pixel-level diffusion is further adopted to strengthen the security and sensitivity of the cryptosystem, and the resulting cipher-images are obtained.The experimental results show that the presented encryption algorithm has the advantages of large key space and high security, and fast encryption/decryption speed. 1.