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:
Aug. 25, 2009
Filed:
Jan. 13, 2005
Hiroshi Yasuda, Kanagawa, JP;
Hiroshi Yasuda, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method of confirming a certificate by using a management computer that issues the certificate is disclosed. The management computer is coupled to an application terminal for applying for issuance of the certificate and to a confirmation terminal for reading a display code printed on the certificate. The management computer performs the steps of: specifying contents to be certified based on an application item received from the application terminal; issuing the certificate by calculating a compressed value by substituting data related to the contents to be certified into a one-way function, and by generating print data for printing a display code including the compressed value and the contents to be certified; recording an issuance history of the certificate; and when data of a compressed value are received from the confirmation terminal that reads the display code on the certificate, notifying the confirmation terminal of authenticity of the certificate based on a result of comparison between the received compressed value and the compressed value calculated in the step of issuing the certificate.