A mod and xor coupling encryption algorithm for image based on 2D-LSM

In recent years, how to ensure the secure transmission of images in the network has been the focus of scholars. Since chaos has good ergodicity, it can generate a long pseudo-random key stream, which is very suitable for participating in the design of cryptographic systems. Aiming image encryption with the low security, image encryption algorithm with a high-security is proposed. First, the key of the cryptosystem is generated from the original plaintext. Next, using the generated secret key and iteratively generates the key stream required by the cryptosystem with the 2D-LSM, Finally, get the ciphertext image using the encryption algorithm that scramble and diffusion simultaneously, and each ciphertext value is calculated from the key stream and the plaintext. The results show that ciphertext of the encryption algorithm has better correlation, and a good security.