Composite chaos-based lossless image authentication and tamper localization

To improve the robustness to combined attack of signal processing plus tamper, a composite chaos-based lossless scheme for image authentication and tamper localization is proposed. A non-successive composite chaos (NSCC) is described, and its performance is analysed by some evaluation indicators. Then NSCC is employed to disturb original image and generate chaotic logo, which enhances the security and robustness of lossless image authentication scheme due to the good performance of NSCC in these aspects of randomness, complexity and ability of anti-forecast technology. Experimental results demonstrate that the proposed scheme is not only safe, but also realizes the correct extraction of logo and precise detection of tampered region position and shape under various attacks, especially signal processing plus tamper attack.

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