Huayin Si

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In this work, we propose a novel fragile watermarking scheme in wavelet transform domain, which is sensitive to all kinds of manipulations and has the ability to localize the tampered regions. To achieve high transparency (i.e., low embedding distortion) while providing protection to all coefficients, the embedder involves all the coefficients within a(More)
In transform-domain fragile watermarking schemes for authentication purposes, a common practice is to watermark some selected transform coefficients in order to achieve low embedding distortion. However, we point out in this work that leaving most of the coefficients, usually the low frequency and zero-valued ones, unmarked opens wide security gap for(More)
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