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:
Feb. 16, 2010
Filed:
Mar. 04, 2004
Kei Tateno, Tokyo, JP;
Masahiro Sueyoshi, Kanagawa, JP;
Yoshiaki Hirano, Kanagawa, JP;
Katsuyuki Teruyama, Tokyo, JP;
Kei Tateno, Tokyo, JP;
Masahiro Sueyoshi, Kanagawa, JP;
Yoshiaki Hirano, Kanagawa, JP;
Katsuyuki Teruyama, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A data processing device, in a system performing authentication among a plurality of storage device (IC cards etc.), able to maintain security of authentication at other device even when secrecy of key data held by part of the devices is lost, wherein a key generation unit generates individual key data unique to an IC card based on identification data unique to the IC cards received from the ICs of the IC cards and a card processing unit performs mutual authentication with the IC based on the individual key data.