| 摘要 |
<p>A portable device for storing and transferring funds for use in a funds transfer system. Each portable device (1) is card-like and comprises a memory means (7) for storing a monetary balance, and a plurality of identifying characteristics of the user. Micro-computer means (10) in the card (1) update the balance after funds transfer, and randomly select some of the identifying characteristics to query the user. The users response is compared with the stored characteristics. Ultra-sonic coupling means (40) in the card permits coupling to another card (1) through a coupling terminal (2). A keyboard (30) and a digital display (28) permit inspection of the balance. The micro-computer (10) date and time stamps each transaction.</p> |
