Method and system for sustainable digital watermarking

Details Method and system for sustainable digital watermarking Method and system for sustainable digital watermarking

2008-07-01

2008-07-01

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S168000, C713S194000

Reexamination Certificate

active

10478696

ABSTRACT:
Digital marks (so-called fingerprints and watermarks) serve two basic purposes: (1) Investigative: the owner reads a fingerprint to determine how the marked entity leaked; and (2) Legal: the owner must prove in court that (a) there is a watermark (a concealed copyright message), and (b) it is the owner's. The main difficulty of item (2) is that the first use of the watermark software reveals the watermarking method to the public so that hostile parties are equipped to remove or damage its watermarks. The invention uses tamper-resistant software encoding techniques to protect the digital mark extractor algorithm, frustrating the attacks of hostile parties in two ways: the resulting code is obscure (that is, its inner workings are incomprehensible; and chaotic (that is, a modification at any point will almost certainly produce a nonsense program.

REFERENCES:
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patent: 5991519 (1999-11-01), Benhammou et al.
patent: 6330672 (2001-12-01), Shur
patent: 6700993 (2004-03-01), Minematsu

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