Data updating method and data updating system

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

H - Electricity

04

L

H04L 9/30 (2006.01) G06F 21/00 (2006.01) G06K 19/07 (2006.01) G07F 7/10 (2006.01) H04L 12/16 (2006.01)

Patent

CA 2428254

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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