The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2016
Filed:
Aug. 13, 2013
Applicant:
Adobe Systems Incorporated, San Jose, CA (US);
Inventors:
James D. Pravetz, Sunnyvale, CA (US);
Krish Chaudhury, Saratoga, CA (US);
Sunil Agrawal, Milpitas, CA (US);
Assignee:
Adobe Systems Incorporated, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/04 (2006.01); H04L 9/32 (2006.01); G06F 21/62 (2013.01);
U.S. Cl.
CPC ...
H04L 9/3247 (2013.01); G06F 21/6218 (2013.01);
Abstract
Methods and apparatus, including computer program products, implementing and using techniques for document authentication. An electronic document is presented to a user. The electronic document has data representing a signed state and a current state. A disallowed difference between the signed state and the current state is detected, based on one or more rules that are associated with the electronic document. A digital signature associated with the electronic document is invalidated in response to the detecting.