Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-01-13
2009-08-25
Revak, Christopher A (Department: 2431)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S179000, C708S203000
Reexamination Certificate
active
07581102
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.
REFERENCES:
patent: 5768382 (1998-06-01), Schneier et al.
patent: 5970143 (1999-10-01), Schneier et al.
patent: 6823075 (2004-11-01), Perry
patent: 7080041 (2006-07-01), Nagel
patent: 7089420 (2006-08-01), Durst et al.
patent: 7152047 (2006-12-01), Nagel
patent: 7178030 (2007-02-01), Scheidt et al.
patent: 7362862 (2008-04-01), Schneier et al.
patent: 7373506 (2008-05-01), Asano et al.
patent: 2002/0012445 (2002-01-01), Perry
patent: 2002/0138771 (2002-09-01), Dutta
patent: 2003/0147548 (2003-08-01), Ruhl et al.
patent: 2004/0153649 (2004-08-01), Rhoads et al.
patent: 2006/0161779 (2006-07-01), Geoffrey
patent: 2002-200872 (2002-07-01), None
patent: 2004-280603 (2004-10-01), None
Morrison & Foerster / LLP
Revak Christopher A
Ricoh & Company, Ltd.
LandOfFree
Certificate confirmation method, certificate confirmation... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Certificate confirmation method, certificate confirmation..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Certificate confirmation method, certificate confirmation... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4081841