| 摘要 |
The invention concerns an online transaction method comprising a step wherein a digital file is prepared; a step wherein said file is transmitted by the addressor to the transaction server; a step wherein said addressee is notified by the server of the availability of said file; and a step wherein said file is transmitted to the addressee. The invention is characterised in that the transaction server carries out a back-up step after each reception of a digital file which consists in calculating a signature of said file, in transmitting said file over at least an archiving server physically independent of said transaction server, in verifying from a control server optionally separate from the transaction server the conformity between the signature calculated respectively by the transaction server and the signature calculated by the archiving server. |
