Protecting the integrity of electronically derivative works

An integrity and document technology, applied in digital data protection, electrical components, electrical digital data processing, etc., can solve the problems of not being able to detect whether the original document has been changed by the lender, or whether the original document or form data has been changed.
CN101449508AInactive Publication Date: 2009-06-03ADOBE SYST INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ADOBE SYST INC
Publication Date
2009-06-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

Systems and methods provide a mechanism to protect the integrity of electronically derivative works. One aspect of the systems and methods includes receiving an original document including a first digital signature. After the document is derived, a second digital signature is created. The second digital signature may include the first digital signature, a message digest from the first digital signature, and a message digest for the second digital signature. A further aspect of the systems and methods include assigning a security key to a document processing application. The assigned key may be used to produce the second document signature.
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Description

[0001] priority statement

[0002] This PCT application claims the benefit of the filing date of U.S. Patent Application Serial No. 11 / 375,807, filed March 14, 2006, entitled "Protecting the Integrity of Electronically Derivative works" , which is hereby claimed priority under 35 U.S.C. § 120 or 365(c), which application is hereby incorporated by reference in its entirety. technical field

[0003] Embodiments relate generally to processing electronic works such as documents, and more particularly to protecting and verifying the integrity of electronic works.

[0004] Limited Copyright Waiver

[0005] A portion of the specification of this patent document contains material that is protected by copyright notice. The copyright owner has no objection to the reproduction by anyone of the patent document or the patent disclosure as it appears in the files or records of the United States Patent and Trademark Office, but reserves all other rights. Background technique

[0006] ...

Claims

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