| 摘要 |
<p>The present invention relates to an electronic purse data carrier for performing monetary transactions and a method for managing electronic payments with such a carrier. The purse stores one or more payment units each having a respective monetary value (12), whereby each of said payment units has a respective unique payment unit-ID (10) and comprises an age information (14,16) evaluable for delimiting the use of it. In particular said inforamtion defines a dynamically changing age level. This can be used to force purse owners to return each electronic monetary unit back to the issuing party after a specified cycle measured in time or transactions has passed in order to validate the authenticy, and in particular in order to testing for possibly duplicated monetary units.</p> |
