Method for secure point to point facsimile transmission

摘要

The procedure consists of using a transmission system containing a security module (17) with a memory card reader able to read a card belonging to a user and containing a first secret code authenticating the user's identity, a second code enabling the card to devise a session key in common with that of the addressee's memory card, the key serving to encode the document, and a third code enabling the card to calculate a numerical signature. The encoded document is transmitted, with the receipt of each page acknowledged with a date/time code which is verified before the next page goes out, and with the transmission interrupted if it does not tally with the transmission date/time code.