Dynamic RNA Coding Color Image Cipher Based on Chain Feedback Structure

This paper proposes a dynamic RNA-encoded color image encryption scheme based on chain feedback structure. Firstly, the pure is decomposed into red, green, and blue components, then chaotic sequence plaintext association introduced to encrypt red component. Secondly, intermediate ciphertext obtained by diffusion after bit-level permutation, RNA encoding, operation rules, decoding. Finally, enhance security of cryptosystem, green components are repeatedly encrypted using mechanism associated with obtain cryptographic image. In this paper, 2D-SFHM system used provide pseudo-random sequences, its initial key calculated combining hash function external parameters image, one-time strategy causes proposed effectively resist attacks. Experimental results analysis show that our algorithm has excellent effects performance against various typical