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Copyright of Journal of Hubei Open Vocational College is the property of Journal of Hubei Open Vocational College Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Henan University of Science & Technology, Natural Science is the property of Editorial Office of Journal of Henan University of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Chongqing University of Posts & Telecommunications (Natural Science Edition) is the property of Chongqing University of Posts & Telecommunications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Among the existing chaotic image encryption algorithms, there are problems such as low system security, inability to resist plaintext attacks, independent of encrypted images, and low efficiency. This paper proposed a double-graph association encryption algorithm based on a hyper-chaotic system. At first, it used a hyper-chaotic system together with the secret key to generate the key chaotic random matrix for image encryption. Then it masked plain images by the diffusion process. After that, it selected the first image to perform operations of plaintext-related scrambling and fast bit diffusion to generate cipher image. Finally, it subjected the remaining images to an adaptive correlation bit operation to generate a cipher image. Simulate results and comparative analysis show that the proposed image cryptosystem has the characteristics of large key space, the faster encryption/ decryption speed, the higher sensitivity, the better statistical properties of cipher image, and etc. And the corresponding plain text image cannot be obtained by only one cipher image. Therefore, the application prospect is greater. [ABSTRACT FROM AUTHOR]