Source: http://www.google.nl/patents/US6327656?hl=nl
Timestamp: 2013-06-20 10:23:33
Document Index: 687345410

Matched Legal Cases: ['art 19914', 'art 1997', 'art 200016', 'art 2008', 'art 2009', 'art 2009', 'art 200127', 'art 20028', 'art 2011', 'art 2011', 'art 2011', 'art 20107', 'art 200514']

Patent US6327656 - Apparatus and method for electronic document certification and verification - Google PatentenZoeken Afbeeldingen Maps Play YouTube Nieuws Gmail Drive Meer » Geavanceerd zoeken naar patenten | Webgeschiedenis | Inloggen Geavanceerd zoeken naar patenten PatentenThe certification of electronic documents for subsequent verification and authentication is disclosed. Pursuant to a request to certify a document, a digital signature is extracted from the document. The digital signature corresponds to the content of the document and is unique to the document. Thus,...http://www.google.nl/patents/US6327656?utm_source=gb-gplus-sharePatent US6327656 - Apparatus and method for electronic document certification and verification PublicatienummerUS6327656 B2PublicatietypeVerlening Aanvraagnummer08/886,874 Publicatiedatum4 dec 2001 Aanvraagdatum2 juli 1997 Prioriteitsdatum3 juli 1996Ook gepubliceerd alsUS20010011350, WO1998002968A2 Publicatienummer08886874, 886874, US 6327656 B2, US 6327656B2, US-B2-6327656, US6327656 B2, US6327656B2 UitvindersMahboud Zabetian Oorspronkelijke patenteigenaarTimestamp.Com, Inc.Patentcitaties (9), Niet-patentcitaties (3), Verwijzingen naar dit patent (81), Classificaties (16) Externe links: USPTO, USPTO-toewijzing, EspacenetApparatus and method for electronic document certification and verificationUS 6327656 B2 Samenvatting The certification of electronic documents for subsequent verification and authentication is disclosed. Pursuant to a request to certify a document, a digital signature is extracted from the document. The digital signature corresponds to the content of the document and is unique to the document. Thus, signatures extracted from documents that are even slightly different from the certified document, or from a document that has been changed, will be different. A certification provider maintains the digital certification signature, an identification code such as a serial number, and other information such as the time and date of certification. The serial number is returned to the certification requester. When verification is sought, the serial number and the document alleged to have been certified are given to the certification provider. The serial number is used to index the previously extracted digital certification signature. The same extraction process is used to extract a signature from the document alleged to have been certified. Then the digital signatures are compared. A match indicates that the alleged document and the previously certified one are the same, and a mismatch indicates the opposite. The certification can be used to provide an electronic timestamp for a document, thus providing proof of possession of the document at the time of certification. It can also be used in conjunction with an electronic mail transmission to a third party recipient, thus providing certified electronic mail.
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