Data updating method and data updating system

Details Data updating method and data updating system Data updating method and data updating system

2007-09-04

2007-09-04

Vu, Kim (Department: 2135)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S155000, C726S009000, C726S020000

Reexamination Certificate

active

10436995

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.

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