Method of transmitting data quickly and securely from a smart ca

Details Method of transmitting data quickly and securely from a smart ca Method of transmitting data quickly and securely from a smart ca

1994-07-07

1996-07-02

Swarthout, Brent A.

Communications: electrical

Traffic control indicator

Combined

235384, 380 23, 902 26, G08G 100

Patent

active

055326897

ABSTRACT:
A method of transmitting data quickly and securely from a smart card during a remote transaction between a fixed station and a mobile item of equipment containing a smart-card reader, said card reader having a fast memory, wherein, on receiving said card, and in addition to storing the data from the card in said fast memory, said reader also stores a pair of data items in said fast memory, one of which data items identifies the number of the card, and the other data item corresponds to an access count indicating the number of accesses to the card, each access by any reader incrementing the access count in the card by unity, and wherein, during the transaction, the mobile item of equipment, which is interrogated remotely by the fixed station, compares said pair of data items stored in said fast memory of said reader with the pair of data items of the card that is currently inserted in the mobile item of equipment, and transmits the result of the comparison and the data of the card, which data is stored in the fast memory, to the fixed station.

REFERENCES:
patent: 5101200 (1992-03-01), Swett
patent: 5120939 (1992-06-01), Claus et al.
patent: 5310999 (1994-05-01), Claus et al.
patent: 5317636 (1994-05-01), Vizcaino
patent: 5379344 (1995-01-01), Larsson et al.
patent: 5422473 (1995-06-01), Kamata
patent: 5424727 (1995-06-01), Shieh
patent: 5450051 (1995-09-01), Stromberg

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