Chaos and Hill Cipher Based Image Encryption for Mammography Images

Information technology is growing day by day, at the same time security of information is major concern. Most of the image encryption algorithm involves the permutation and diffusion strategy. This paper presents, Chaos and Hill Cipher Based Image Encryption for Mammography Images. Proposed method includes permutation and diffusion process. Input gray scale image pixel positions are permuted by using a arnold cat map. Resultant permuted image undergo hill cipher ( matrix multiplication) with a involuntary matrix is generated from the chaotic map. Decryption is the reverse process of encryption. The proposed method easy and simple. Simulation results shows that proposed method achieves the good level of security.