Research On Image Encryption Method Based On Chaotic Sequence Optimization

Chaos can generate near-random sequences from deterministic chaotic systems,characterized by numerical motion trajectories that are extremely sensitive to initial conditions after passing through chaotic functions several times.Therefore,the study of the encryption value of chaotic sequences in image encryption systems has become an important topic in the field of image encryption.In this paper,we focus on the in-depth study of chaotic preferential encryption theory for images.Firstly,the concepts related to chaotic image encryption systems and image hiding encryption are studied,concurrently,the basic theory and classification of chaotic systems is also explained.In the study of image hiding,an important step of encryption in order to enhance the relative hiding amount is image compression,so the concept of image compression and the classification of compression methods are elaborated.Combining the above two points to study and research on image encryption theory,the definition and classification of image encryption,the theory of chaotic image encryption and the theory of image hiding aspects are introduced.The study focuses on the depth window scrambling encryption method based on chaos optimization,combining the idea of window to construct chaos window scrambling,and encrypting the same image with chaotic sequences of different initial values.The results of the simulation are excellent and stable.On the basis of the depth window scrambling encryption method,we combine the image hiding method and the improved compression algorithm to hide the image,focusing on the principle of the improved image compression method,introducing the specific steps of compression,encryption,hiding and chaos preference method,and simulating and analyzing this method in terms of image embedding rate,detection resistance and image restoration effect,focusing on the improved compression algorithm’s The effect of the improved compression algorithm on the compression rate and restoration effect,and its effect on the relative embedding amount,is analyzed.