An Image Encryption Algorithm Based on Random Walk and Hyperchaotic Systems
Cong Xu, Jingru Sun, Chunhua Wang
Abstract
In this paper, we propose an image encryption algorithm based on random walk and two hyperchaotic systems. The random walk method is adopted to scramble the position of pixels within a block. Furthermore, the permutation operation between blocks is presented to enhance the scramble effect. Thus, high correlation among pixels of original image is broken by permutation. Moreover, the chosen plaintext attack is used to test the anti-attack ability of the proposed algorithm. By analyzing experimental results and comparing with other image encryption algorithms, we show that the proposed algorithm has better performance and higher security.
Topics & Concepts
EncryptionPermutation (music)Image (mathematics)AlgorithmPixelRandom walkPlaintextRandom permutationComputer scienceBlock (permutation group theory)CryptographyPosition (finance)Pseudorandom permutationMathematicsTheoretical computer scienceArtificial intelligenceBlock cipherComputer securityStatisticsPhysicsEconomicsFinanceGeometryAcousticsChaos-based Image/Signal EncryptionAdvanced Steganography and Watermarking TechniquesCellular Automata and Applications