Research On The Key Technoloogy Of Camouflage Image Encryption Based On Compressed Interference

Optical image encryption technology,as one of the important branches in the field of image encryption,has attracted wide attention in the field of information security because of its characteristics of high speed parallel,large capacity and strong robustness.The interference encryption technology has the effect of contour appearance,the double random phase encryption technology and the Fresnel encryption technology have weak resistance to the chosen plaintext attack,and the encryption technology based on Fourier transform has linear and nonlinear problems in the encryption and decryption process.How to improve the security and stability of the optical image encryption system without increasing the burden of transmission and storage is an important research direction in this field.The project "Research on Compressed Interference Camouflage Image Encryption Technology" respectively focuses on the contour developing effect and the ability to resist the chosen plaintext attack of optical encryption algorithm.On the basis of traditional interference image encryption algorithm,camouflage image encryption algorithm and sine mapping are introduced to improve the transmission security of the system while efficiently encrypting and decrypting.The specific research contents are as follows:Firstly,this paper studies the related algorithms of optical image encryption.Since optical image encryption itself has the natural advantage of high speed and parallel,the efficiency of information transmission and storage is relatively high.Therefore,it mainly starts from improving the security of the algorithm.In the numerical simulation of the interference-based image encryption,it is found that the algorithm suffers from the contour revealing effect,and the reasons for this are analyzed and conclusions are drawn accordingly.Secondly,a camouflage image encryption algorithm based on compression interference is proposed,which integrates the camouflage image encryption algorithm into the optical image encryption algorithm.By embedding the sparse ciphertext generated from the secret image into the camouflaged image,the contour revealing problem of the optical encryption algorithm is eliminated,and in the decryption process,different reconstructed images can be obtained in two ways,which enhances the confusion of the algorithm.It is verified through simulation experiments that the algorithm can effectively resist statistical attacks,noise masking attacks and attacks from U-net networks,further improving the security of the algorithm.The effectiveness and reliability of the algorithm are verified by numerical simulations.Finally,tangent mapping is proposed on the basis of sine mapping,which expands the phase space of chaotic mapping and improves the random degree of the mapping.The algorithm is applied to camouflage image encryption algorithm based on compression interference,and a new encryption algorithm based on compression interference is proposed.The experimental results prove that the algorithm not only expands the key space,but also realizes the one-to-one mapping relationship between the key and the plaintext.and the numerical analysis proves that the algorithm can effectively resist the chosen plaintext attack.