基于明文相关的混沌映射与SHA-256算法的数字图像的加密与监测

Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-10-11 Cooperative journals: 《计算机应用研究》

刘西林 严广乐

Abstract： For the security problem of the spread of digital image and the digital image encryption from plaintext and too depend on the chaotic systems, this paper proposes a digital image encryption and monitoring algorithm combined with plaintext-related chaotic mapping and SHA-256. The algorithm uses the SHA-256 algorithm to calculate the hash value as record to monitor the spread of digital image; Lorenz chaotic mapping generates the corresponding cryptogram by using forward diffusion, associated plaintext scrambling and backward diffusion to encrypt the digital image. The results show that the algorithm can resist many attacks and achieve the security and concealment of image propagation.

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