关键词: Contourlet变换, 加密, 混沌映射

Abstract: Concerning the security of the Contourlet-based set partitioning in hierarchical trees compression method, a new image encryption algorithm based on chaos mapping was proposed. The presented algorithm contained two steps: ranked tables permutation using chaotic scrambling arrays; bit streams XOR processing using chaotic binary streams. The simulation results indicate that the cipher image satisfies requests for content masking. It also demonstrates that the proposed algorithm is sensitive to the initial values and has fast speed and high security.

Key words: Contourlet transform, encryption, chaos mapping