Method of sharing a key serving to derive session keys for encrypting and authenticating communications between an object and a server

Abstract

The invention relates to a method of sharing of a reference key (AppKey) between a connected object (1) and at least one server (2), the method comprising the steps of: application (102) by the object (1) of a function (f) to at least one datum (DevEUI, AppEUI, DevNonce) and to a key (KSE) specific to a secure element of the object (1) to generate the reference key, transmission (108) to the server (2) of a join request of the object (1) to a network of connected objects, comprising the datum, the key (KSE) of the secure element (4) not being transmitted to the server (2), obtaining, by the server (2), of the key (KSE) of the secure element (4) on the basis of the request, application (208) by the server (2) of the function (f) to the datum and to the key (KSE) obtained by the server (2), so as to obtain the reference key.

Dependencies are inferred from the claim text.