A hash-based image content authentication scheme for tamper detection using compressive sensing

In this paper, a novel hash-based image content authentication scheme for tamper detection and localization is proposed. The original image is divided into sub-blocks whose size can be tuned with the accuracy of tamper localization, and the measurements which are obtained in the compressed sensing (CS) process contain all the information of the subblocks. Moreover, singular value decomposition (SVD) is applied to capture the most energy of measurements and compress them into a compact hash. Experimental results have shown that the proposed method is robust with a reliable security.