Process for the acceptance of a virtual prepaid card use request permitting the reuse of its serial number

Process for the acceptance of a use request of a virtual prepaid card permitting reuse of serial numbers, involving the following stages:

• a user of a virtual prepaid card is connected to a server containing a data base of serial numbers used for identifying prepaid cards, remaining credits to be consumed and validity dates of said cards,
• said user obtains authentication from the server by communicating thereto an authentication sequence,
• said server supplies said sequence to a security processor that checks the validity thereof,
• in the case of the validity thereof, the processor transmits a consumption authorization to the server,
• after receiving said authorization, the server gives its agreement to the use request, within the credit limits remaining on the card and the validity date thereof,
• wherein during a use request, the server supplies the security processor with, besides the authentication sequence, a version number associated with each card, which is incremented when the card is empty or obsolete and which is stored in the server data base and wherein said processor recalculates the authentication sequence, which is dependent on the version number, prior to checking its validity.