| 摘要 |
The invention concerns a method for carrying out a guarantee deposit between an owner-electronic purse (owner-PME) and a client-electronic purse (client-PME). The invention is characterised in that the method consists in producing in each PME a guarantee trace file with a guarantee-field and a recovery deadline-field. For each guarantee deposit operation, the method consists in: in a step of guarantee deposit collection, a balance file of the client-PME is debited of the amount of the deposit and the deposit amount and recovery deadline are posted in the PME deposit trace files, the balance file of the owner-PME not being credited with the deposit amount; in a recovery step, the client-PME balance file is credited with a refunding amount not more than the deposit amount, the owner-PME balance file being credited with the difference between the deposit amount and the refunding amount and the owner-PME balance file being credited with the deposit amount if the goods are not recovered.
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