Research on Digital Image Information Security and Encryption Technology

The development mode of digital and Internet communication has contributed to the phenomenon of taking digital image as the information transmission carrier. Therefore, the transmission network and sending and receiving equipment of digital images are extremely easy to receive external intrusion and attacks, causing information leakage and other information security accidents. On the basis of the digital image features, the digital graphic encryption method and the defects of single feature encryption, further study the chaotic encryption technique of multiple angle encryption. Constructing a modified tesseract transform using chaotic sequence and mirror transform to dislocate the image, and performing a cyclic dissimilarity between the gray values of each pixel point and chaotic sequence to achieve diffusion and confusion between pixel points increases the complexity of the key and increases the number of keys. It makes the time required to crack increase. The algorithm design is simple and easy to implement, and the experimental simulation results conclude that the algorithm has the advantages of easy implementation, sensitivity to the perturbation of the initial conditions of the system, and large key space compared with the traditional chaotic encryption algorithm.