DNA image encryption based on the residual number system

In recent years, image data information security has gradually attracted people’s attention. In order to ensure the reliable transmission of images, this paper designs an encryption algorithm based on the residual number system for the two shortcomings of single chaotic sequence and high algorithm complexity in a large number of color image encryption algorithms. This algorithm takes advantage of the feature that the color image can be decomposed into three-layer components, and uses an associated (parallel scrambling-ordered diffusion) encryption mode for the three-layer components, making it difficult to crack any one layer of the color image alone, and With the help of the residual number system, each modular operation has natural independence, parallel characteristics, and there is no carry between each other, which increases the flexibility of the encryption method and reduces the complexity. The experimental results show that it is compared with other image encryption that uses chaos combined with DNA encoding. The encrypted histogram becomes smoother, has a higher sensitivity to the key, and the correlation between adjacent pixels of the ciphertext image is low. The encryption process is optimized to increase the transmission speed of the image.