Research On Information Hiding Technology Based On Computational Correlated Imaging

With the increasing development of the network,the deficiency of traditional information security technology is getting increasingly prominent.The security protection of personal privacy information and the security transmission demand of important data have brought great challenges to information technology.In order to cope with the risk of malicious attacks and eavesdropping during transmission of digital images,the protection of information security is a problem that has to be solved.In recent years,information encryption technology based on optical theory and method has become a research hotspot for its unique advantages such as rapid parallel data processing capacity,multi-dimension,large capacity,high robustness,large key space and so on,which makes an important breakthrough in optical information encryption technology.However,it has been discovered that computational correlative imaging(CCI)encryption systems are linear systems,which cannot be used to defend against plaintext attacks.Therefore,the encryption scheme based on CCI may have certain security risks.In order to solve this risk,data transmission between communication parties can be hidden,so that information can be safely transmitted.Based on the above problems,this paper proposes two kinds of information hiding schemes based on CCI encryption system.(1)Discrete cosine transform(DCT)information hiding scheme based on binary correlation imaging.Firstly,the encrypted image is encrypted by the computational correlation imaging system,and the encrypted data is binarized,and then embedded into the DCT domain of the host image to hide the encrypted information.Simulation results show that this method has good concealment and fault-tolerant ability,and it is a blind extraction method without the help of original host image.(2)Discrete wavelet transform(DWT)information hiding method based on binary correlation imaging.First,the original image is encrypted by the correlation imaging system,then the ciphertext is binarized and embedded into the wavelet coefficients of the host image.The scheme has good invisibility to ciphertext,and the encryption key is generated by Logistic mapping,which greatly reduces the number of keys to be transmitted.In addition,the chaotic key is used in the stage of encryption and data embedding,and the security of the encrypted image is guaranteed by the two-level key.The numerical simulation results show that the binary ciphertext processing will not cause serious distortion to the reconstructed encrypted image.The technology can resist multiple malicious attacks to a certain extent and has good robustness.In this paper,by comparing and analyzing the performance indexes of the two schemes,the simulation experiment shows that both schemes can obtain better hiding effect,and the system has high security and robustness.In the performance of hiding capacity,DWT information hiding scheme is better than DCT information hiding scheme.