Patent ID: 6347373
Filing Date: 2002-02-12
Classification: H04L

Abstract:
Method for protected storage of data from message traffic taking place between at least two communication appliances (1, 2, 3, 7, 8, 9), comprising the following steps:a. setting-up of a telecommunication link to dispatch said data between at least a first communication appliance (1, 2, 3) and a second communication appliance (7, 8, 9); b. setting-up of a monitoring link (13) between the telecommunication link and telecommunication means (10) of a third party; c. storage of a first identity of either a first user of the first communication appliance (1, 2, 3) or of the first communication appliance (1, 2, 3) and a second identity of either a second user of the second communication appliance (7, 8, 9) or of the second communication appliance (7, 8, 9) by the telecommunication means (10) of the third party; d. encipherment of the data using a symmetrical conversation key to render enciphered data; e. storage of the enciphered data by the telecommunication means (10) of the third party, f. storage of the symmetrical conversation key enciphered using public keys of the first and second users by the telecommunication means (10) of the third party; g. signing of said enciphered data and also of the stored first and second identities by the telecommunication means (10) of the third party.