A Bidirectional Diffusion Based Image Encryption Scheme for Color Images

The goal of this work is to develop an encryption scheme for secure transmission for colour images over untrusted channel. A bidirectional diffusion based encryption technique for 8-bit RGB colour image is performed. The encryption process is used to protect the image in transit. Also the encryption steps will be conducted using a fixed block size of $8 \times 8$ which will enhance the robustness against cipher text only attacks. The performance analysis of encryption scheme is conducted using various tests and observed that the proposed algorithm is robust against various cryptanalytic attacks.