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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.:

US 6742119 B1

PDFFull Text
Date of Patent:
May. 25, 2004

Filed:

Dec. 10, 1999

Time stamping method using time delta in key certificate

Applicant:
Inventors:

Mohammad Peyravian, Cary, NC (US);

Allen Roginsky, Durham, NC (US);

Nevenko Zunic, Wappingers Falls, NY (US);

Stephen M. Matyas, Jr., Manassas, VA (US);

Assignee:

International Business Machines Corporation, Armonk, NY (US);

Attorney:

Coats & Bennett, P.L.L.C.

Primary Examiner:

Gilberto Barron

Assistant Examiner:

Kyung H Shin

Int. Cl.
CPC ...
H04L 9/00 ;
U.S. Cl.
CPC ...
H04L 9/00 ;
Abstract

A method for time stamping a digital document is disclosed. The document originator creates a time stamp receipt by combining the document and a digital time indication. The time stamp receipt is submitted to a time stamping agent having a trusted clock. The time stamping agent optionally validates the time stamp receipt and then computes the age of the time stamp receipt. If valid, the time stamping agent certifies the time stamp receipt by signing the time stamp receipt with a private signature key. The private signature key is selected from a group of signature keys by the time stamping agent based on the computed age of the time stamp receipt.

Find Patent Forward Citations

Peyravian, Mohammad. (2004). Time stamping method using time delta in key certificate (U.S. Patent No. 6742119). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6742119

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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