Method of safeguarding transactions on payment cards
摘要
The issuing companies provide for each operator or store a key card with a key code and a set total amount to be paid by the operator to the company issuing the card. Each transaction by a card owner is deducted from this amount and a booking code is formed from the key code and the transaction and compared with code an the payment card.
申请公布号
DE4426486(A1)
申请公布日期
1996.02.01
申请号
DE19944426486
申请日期
1994.07.26
申请人
SCHEIDT & BACHMANN GMBH, 41238 MOENCHENGLADBACH, DE