Watermarking systems and methods
First Claim
1. In a method that includes encoding one or more content objects with a steganographic digital watermark, the encoding including embedding a collection of features that can be used to facilitate computation of geometrical distortion of the object after encoding, the geometric distortion including rotation, an improvement including step for making the collection of features resistant to collusion attack.
3 Assignments
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Accused Products
Abstract
Various improvements and applications for digital watermarking technology are detailed. One concerns techniques for making watermarks resistant to malicious attacks. Another involves using digital watermarking with ID cards and credentials, such as a watermarked driver'"'"'s license conveying a user'"'"'s cryptographic PKI. Still another uses digital watermarks in connection with automated compliance audits for corporate users of electronic content. A variety of other technologies are also detailed.
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Citations
6 Claims
- 1. In a method that includes encoding one or more content objects with a steganographic digital watermark, the encoding including embedding a collection of features that can be used to facilitate computation of geometrical distortion of the object after encoding, the geometric distortion including rotation, an improvement including step for making the collection of features resistant to collusion attack.
Specification