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:
Sep. 04, 2007
Filed:
May. 14, 2003
Keisuke Nakayama, Tokyo, JP;
Keisuke Nakayama, Tokyo, JP;
Systemneeds, Inc., Tokyo, JP;
Abstract
The present invention provides a data updating method and a data updating system, which can update data of an IC card through a network without mistaking the IC card targeted for updating. When each of issuer client authentication, personal authentication, issuer server authentication and device authentication is performed, a server transmits update data encrypted by a public key used for the device authentication to a client. Then, the client outputs the encrypted update data to an IC card. In the IC card, the update data is decrypted by a secret key used for the device authentication. Based on the decrypted update data, rewriting is carried out in the IC card.