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US 2006/0242418 A1Published application
Method for ensuring the integrity of image sets
AssigneeXerox Corporation
InventorsJutta Willamowski, Damian Arregui, Gabriela Csurka
Life of this patent
Estimating the term…
Abstract
A method which can be utilized for protecting the integrity of a set of digital documents includes, for each of the digital documents in the set, extracting information from the document, incorporating the information into a watermark, and embedding the watermark into at least one other document in the set.
Claims24
A method comprising:
- for each of the digital documents in a set of digital documents:
- extracting information from the document,
- incorporating the information into a watermark, and
- embedding the watermark into at least one other document in the set.
1 more element
A system comprising:
- a first watermarking component which, for each of the documents in a set of digital documents, derives a digital watermark from information in the document;
- and
- a second watermarking component which embeds the digital watermark in another document in the set.
A method for determining the integrity of a set of digital documents comprising:
- watermarking a set of digital documents comprising, for each of the digital documents in the set:
- extracting information from the document,
- incorporating the information into a watermark, and
- associating the watermark with at least one other document in the set;
- and
- from the embedded watermark of at least one of the plurality of digital documents, determining at least one of:
- whether a document from which information was extracted is missing from the set,
- whether a document has been unacceptably modified;
- and
- whether a document has been added to the set subsequent to the embedding of the watermarks.
7 more elements
Dependencies are inferred from the claim text.