Smart card updating process

Details Smart card updating process Smart card updating process

1994-03-31

1996-02-27

Hajec, Donald T.

Registers

Records

Conductive

235380, 902 4, 902 26, G06K 1906

Patent

active

054950988

ABSTRACT:
Smart card payment process.
The card in particular contains an irreversible counter, a balance and a certificate proving the integrity of the preceding informations. The content of the card can only be updated by terminals knowing, the calculation secrets of the certificate. By means of the irreversible counter which intervenes in the calculation of the certificate, it is not possible to reload into the card a prior content (balance/certificate), because such a reloading requires the incrementation of the counter, which renders null and void the prior certificate.

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