The evolution of computer network technology, digital images are broadcast in public communication network. So that ensuring the security of digital image attracts more attention. In the proposed work we propose cryptography DNA encryption and chaos theory which combines the encryption and reversible data hiding techniques for embedding. In order to this techniques used to achieve primary concerns of security. In this method firstly, input image is converted into RGB components. These RGB matrix are transformed into two DNA encoded matrix. Chen’s hyper chaotic map is applied for odd pixel value based DNA encoded matrix and Lorenz chaotic map is used for even pixel value based DNA encoded matrix to produce the chaotic sequence separately. To interchanging the pixel position of two DNA encoded matrix with chaotic sequence. Final step is to perform an add operation which can add two matrices to get the resultant encrypted image. Next stage for embedding, For data embedding the repeating process of histogram equalization can be performed. The proposed algorithm was analyzed and evaluated using data set of different images. The experiment result shows the strength of the proposed algorithm.

Keywords : DNA Cryptography, Chen’s hyper chaotic map, Lorenz chaotic map, RDH Algorithm.