Abstract
This paper proposes a fast image encryption method using parallel compressive sensing (PCS), composite chaos and DNA sequence. Firstly, to reduce the amount of information transmission and improve computational efficiency, PCS is utilized to the image encryption scheme. The measurement matrices of PCS are generated by Logistic-Tent system (LTS). Next the compressed and encrypted image is blocked and encoded to DNA matrix. And then it is diffused with a chaotic DNA matrix created by Logistic–Sine system (LSS). Finally, the scrambled image is permuted by Tent–Sine system (TSS). It is worth noting that hash values of the original image produced by SHA-256 is adopted to generate the initial values of LTS, LSS and TSS. And the DNA encoding rules we choose are related to plaintext. Therefore, the proposed image encryption algorithm is highly sensitive to the plain image and has good performance against common attacks. Simulation results and security analysis both demonstrate that the cryptosystem has a high level of security.
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