| 摘要 |
<p>A system for securing financial transactions involving credit and charge cards is described. As well as the normal magnetic stripe (2), the card includes non visible coded information, for example an infra-red readable (but not human eye visible) bar code (3). When the card is personalised, data recorded on to magnetic stripe (2) may be combined with the bar code (3) and a randomly generated PIN number to produce check digits following a given algorithm. Those check digits can be recorded in the magnetic stripe (2). A stand alone validator i.e. not connected to a mainframe computer, can read both data from magnetic stripe (2) and the coded data such as bar code (3) and process the data and the PIN number input via a keypad (41) according to the algorithm to produce the check digits if they match, an indication validating the proposed transaction can be given, for example a green LED (50) lights up.</p> |
