A quadratic-residue-based fragile watermarking scheme


A new fragile watermarking scheme for image authentication and location of areas that have been tampered with is proposed in this paper. Based on a quadratic-residue theorem, the proposed scheme generates the watermark block-by-block in the cover image. To improve security by preventing malicious attacks, such as the vector quantization attack, a pseudo… (More)


5 Figures and Tables

Slides referencing similar topics