Image cryptosystem based on modified Henon chaotic map and dynamic encoding mechanism

In this article, a novel cryptosystem for the protection of images is proposed. The proposed cryptosystem uses two dimensional modified Henon map (2D-MHM) and DNA technology to perform cryptographic operations. Initially, the chaotic sequences are generated from 2D-MHM by using secret key. Then, the chaotic sequences and the plain image are transformed into DNA matrices. The algorithm uses innovative method of random DNA encoding mechanism and DNA arithmetic operations to achieve diffusion operation. Experimental results and security analysis show that the proposed cryptosystem offers high security. Further, it can also resist brute force attack, differential attack and statistical attack.