Patent
Watermarking process resilient to collusion attacks
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TLDR
A watermarking procedure where each of a set of copies of the work has a slightly modified form of a "baseline" watermark that is placed within a critical region of the data is described in this paper.Abstract:
A watermarking procedure wherein each of a set of copies of the work has a slightly-modified form of a "baseline" watermark that is placed within a critical region of the data. The slight variations in the watermarks, however, are not perceptually visible and do not interfere with the work. If multiple persons collude to attempt to create an "illicit" copy of the work (i.e., a copy without a watermark), however, at least one of the modified watermarks is present in the copy, thereby identifying both the illicit copy and the copier.read more
Citations
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Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.
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References
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Journal ArticleDOI
Secure spread spectrum watermarking for multimedia
TL;DR: It is argued that insertion of a watermark under this regime makes the watermark robust to signal processing operations and common geometric transformations provided that the original image is available and that it can be successfully registered against the transformed watermarked image.
Proceedings ArticleDOI
A digital watermark
TL;DR: The paper discusses the feasibility of coding an "undetectable" digital water mark on a standard 512/spl times/512 intensity image with an 8 bit gray scale, capable of carrying such information as authentication or authorisation codes, or a legend essential for image interpretation.
Proceedings ArticleDOI
Techniques for data hiding
TL;DR: This work explores both traditional and novel techniques for addressing the data hiding process and evaluates these techniques in light of three applications: copyright protecting, tamper-proofing, and augmentation data embedding.
Proceedings ArticleDOI
Electronic marking and identification techniques to discourage document copying
TL;DR: Three coding methods are proposed that discourage illicit distribution by embedding each document with a unique codeword, yet enable one to identify the sanctioned recipient of a document by examination of a recovered document.
Journal ArticleDOI
Cryptology for digital TV broadcasting
TL;DR: The description of a conditional access system is given and it is shown that equitable systems need the use of a trusted third party.