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:
Nov. 15, 2005
Filed:
Dec. 10, 1999
Mohammad Peyravian, Cary, NC (US);
Allen Roginsky, Durham, NC (US);
Nevenko Zunic, Wappingers Falls, NY (US);
Stephen M. Matyas, Jr., Manassas, VA (US);
Mohammad Peyravian, Cary, NC (US);
Allen Roginsky, Durham, NC (US);
Nevenko Zunic, Wappingers Falls, NY (US);
Stephen M. Matyas, Jr., Manassas, VA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A time-stamping protocol for time-stamping digital documents uses a time-based signature key. A document or other identifying data is sent to a time stamping authority TSA. The TSA has a time-based signature key that the TSA uses to sign time stamp receipts. The signature key is associated with a fixed time reference that is stored in a public key certificate also containing the public verification key. Upon receiving the document, the TSA creates a time stamp receipt by computing a time difference between the time reference associated with the signature key and the time the document was received. The time difference is appended to the document to create a time stamp receipt and the receipt is then signed by the TSA and transmitted to the requestor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile