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New semi-fragile image authentication watermarking techniques using random bias and nonuniform quantization
Semi-fragile watermarking techniques aim at detecting malicious manipulations on an image, while allowing acceptable manipulations such as lossy compression. Although both of these manipulations areExpand
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A new semi-fragile image authentication framework combining ECC and PKI infrastructures
Presents a new semi-fragile framework aiming at extending public key signature scheme from message level to content level. The content signing procedure includes signature generation and watermarkExpand
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New semi-fragile image authentication watermarking techniques using random bias and nonuniform quantization
Semi-fragile watermarking techniques aim at detecting malicious manipulations on an image, while allowing acceptable manipulations such as lossy compression. Although both of these manipulations areExpand
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A quantitative semi-fragile JPEG2000 image authentication system
We propose a novel integrated approach to quantitative semi-fragile authentication of JPEG2000 images under a generic framework which combines ECC and PKI infrastructures. Firstly acceptableExpand
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New alteration detecting technique for printed documents using dot pattern watermarking
This paper proposes a unique watermarking technique for printed documents by superposing dot pattern blocks on backgrounds of the document images. The dot pattern block contains information, but itExpand
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A watermark embedding and extracting method for printed documents
In this paper, we propose a new method of embedding watermarks into printed documents as well as extracting the watermarks from the printed documents. In the embedding process, unique mesh patternsExpand
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Procede et appareil de filigranage et d'authentification de donnees
La presente invention concerne un procede et un appareil permettant de marquer des donnees avec des filigranes et d'authentifier des donnees. Des codes-objets sont derives de donnees multimedia (desExpand