Method for cancelling a transaction of an electronic payment means, as well as payment means for application of the method
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United States of America Patent
Stats
-
Oct 26, 1999
Grant Date -
N/A
app pub date -
Oct 25, 1996
filing date -
Oct 26, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and system for cancelling payments effected with an electronic payment device (11), such a smart card or IC card, in an off-line payment system including transmitting a check value, such as a random number, from a protected storage module of a terminal (12) to the payment device (11) and subsequently checking the check value in the payment device (11). After performing a positive check, a last transaction in a memory of the payment device (11) is cancelled, for example, by decrementing a pointer.
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