Authentication and recovery of images using multiple watermarks

A novel wavelet domain based semi-fragile watermarking scheme is presented for securing digital content and to concisely determine the regions where the integrity fails. In addition, another watermark is embedded to perform self-recovery in case of malicious attack. The security weaknesses of the traditional block-based approaches are circumvented by correlating the watermark bits with wavelet coefficients of the approximation subband of the host image. Semi-fragility exhibits robustness to JPEG compression, while recovery attribute makes the scheme suitable for video surveillance and remote sensing applications. Experimental investigations are performed to evaluate the performance of the proposed multiple semi-fragile watermarks and shows the suitability of the proposed approach for accurate authentication and recovery based applications.

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