A new image encryption algorithm based on chaos

In order to increase the security of single chaotic system, this paper proposed a new image encryption algorithm based on Chen chaotic system, cellular automaton and DNA. Firstly, the 3-dimension Chen chaotic system generated a pseudo random sequence. Secondly, based on the transformed sequence, it completed the DNA dynamic encoding on plain-text image and cellular automation. Finally, it divided the DNA sequence of the plain-text image into blocks, and then reorganized these blocks; after this, the authors combined these new groups of the DNA sequence of plain-text with the DNA sequence of cellular automation to carry out the mixed operation with the cipher-text cross diffusion mechanism so as to get the final DNA sequence; then decode the final DNA sequence to obtain the encrypted image. By analyzing and testing the secret key space, the sensitivity, the difference characteristics and the information entropy, the results show that the algorithm has the advantages of simple structure, high security and is easier to achieve, so it has great application prospects.