Research And Implementation Of Coverless Information Hiding Algorithm Based On Image Multi-features

Along with the network security problem increasingly prominent, in order to meet the needs of the bank and the government in the field of security, steganography(information hiding) and steganalysis has been widely used in the field of copyright protection and defense. Steganography is the use of the redundant characteristics of the cover, by modifying the cover, embedding secret messages in the cover to achieve secure communication. In the background of big data and cloud computing, in order to fundamentally resist steganalysis detection, coverless information hiding with secret information for the driver to "generate/access" carried cover has become one of research hotspots in the field of information hiding , this paper put forword and implementation of the coverless information hiding algorithm based on image multi-features. The algorithm realizes covert communication by transmitted through public channel selected image,randomizing the hidden information by logistic sequence, constructing the mapping relationship between image characteristics and random numbers, expressing the secret message by the basic features of the image combination.Considering the sensitivity to initial value of Logistic sequence, the paper adopts the sequence randomized pretreatment of secret message. Considering the robustness requirement, the mean brightness feature of spatial domain and DCT DC coefficient feature and DWT coefficient feature of low frequency are used to construct the mapping between the secrete message and the feature matrix. Then the corresponding key is established. The corresponding key and cover image is sent to the receiver to extract the secret information with the same method. The sender select a feature by the brightness of the image to construct the mapping relationship. The performance in the Matlab environment to achieve the coverless information hiding algorithm is tested, the test is divided into two parts: the first part is the algorithm of functional testing, the test of the entire process in the sender and the receiver; the second part is the algorithm of the index test, the security and capacity and robustness of the coverless information hiding algorithm of the DCT DC coefficients feature is carried out. The test results show that the algorithm can meet the requirements of secure communication, and it can ensure very good security, capacity and robustness, so it has very high practical value in the field of high security requirements.