Authentication device and method for a system that includes a subscriber device and a companion device. The authentication method includes the subscriber device delivering to the companion device a temporary profile and an authentication response signed by the subscriber device for sending to a server, installing the temporary profile to configure a second wireless communication interface of the companion device, and requesting a second authentication from the server via the second interface by using the delivered authentication response so as to authorize the second interface when the companion device and the subscriber device are not in communication with each other via the first communication interface.
The device and method may be used by systems that include a subscriber device e. This application is a U. National Stage application of International Application No. The field of the invention relates to a method of authenticating a companion device with an authentication server of a mobile telephone operator, the companion device being connectable to a communication service of the operator via a subscriber device.
For this to operate, the watch needs to be in the proximity of the mobile telephone. Usually, for reasons of integration and cost reduction, the watch does not have its own telephone network subscription card i.
It is then not provided with the communication that would enable it to receive the desired content because it is too far away from the mobile telephone.
There exists a software environment for a watch that makes provision, when the user moves away from the mobile telephone, for a connection to be initiated by means of a WiFi interface instead of the Bluetooth interface. This reconfiguration of communication enables connectivity of the watch to be maintained up to a range of several tens of meters.
