Smart card updating process
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United States of America Patent
Stats
-
Feb 27, 1996
Grant Date -
N/A
app pub date -
Mar 31, 1994
filing date -
Apr 16, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
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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Family
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