| 摘要 |
A smart card (2) of the type used with banking systems has a built in memory and microprocessor. Under normal conditions the card is entered directly into a reader (1A) in a cash point and a PIN number used to gain access. The card is used in association with an auxiliary unit (3) that has a keyboard that allows a code to be entered to set an enable flag in the card circuitry and so allows use
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