Method for cancelling a transaction of an electronic payment mea

Details Method for cancelling a transaction of an electronic payment mea Method for cancelling a transaction of an electronic payment mea

1996-10-25

1999-10-26

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

H04L 900

Patent

active

059741457

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.

REFERENCES:
patent: 4877946 (1989-10-01), Ando et al.
patent: 5220501 (1993-06-01), Lawlor et al.
patent: 5699528 (1997-12-01), Hogan
patent: 5793027 (1998-08-01), Baik
patent: 5815657 (1998-09-01), Williams et al.
NTZ Nachrichtentechnische Zeitschrift, vol. 39, No. 11, pp. 754-759, Nov. 1986, Wolfgang Heberle, et al., "Offentliches Kartentelefon Fur Wert- Und Kreditkarten".

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