Title:
データ更新方法
Document Type and Number:
Japanese Patent JP3754004
Kind Code:
B2
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 (1) transmits update data encrypted by a public key used for the device authentication to a client (4). Then, the client (4) outputs the encrypted update data to an IC card (6). In the IC card (6), 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 (6).
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Inventors:
Keisuke Nakayama
Application Number:
JP2002144486A
Publication Date:
March 08, 2006
Filing Date:
May 20, 2002
Export Citation:
Assignee:
System Needs Co., Ltd.
International Classes:
G06F12/14; G06K17/00; G06F21/32; G06F21/34; G06F21/60; G06F21/62; G07F7/10
Domestic Patent References:
| JP2001282543A | ||||
| JP11219412A | ||||
| JP2001338271A | ||||
| JP2000048141A | ||||
| JP2001325037A | ||||
| JP2001282543A | ||||
| JP11219412A | ||||
| JP2001338271A | ||||
| JP2000048141A | ||||
| JP2001325037A |
Attorney, Agent or Firm:
Nobuhiro Funatsu
Kiyotaka Sakamoto
Kiyotaka Sakamoto
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