Patent ID: 11895487
Assignee: ORANGE
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A non-transitory computer-readable storage medium, on which is stored a program comprising program-code instructions which are executable by a processor of a user equipment arranged to communicate with an application server via a mobile communication network, wherein the instructions configure the user equipment to:
authenticate the user equipment with an authentication server of the mobile communication network, a secret master key being generated, during said authentication, by the user equipment and the authentication server;
after the secret master key is generated by the user equipment and the authentication server, send, to the authentication server, a key request with a view to communicating with the application server; and
compute a key to make a communication between the user equipment and the application server secure by using a key derivation function applied to at least a random variable, a user identifier and an identifier of the application server and using the master key, said random variable having been received by the user equipment from the authentication server after sending the key request to the authentication server.