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1. (WO2018083298) DERIVING A SECURITY KEY FOR RELAYED COMMUNICATION

Pub. No.:    WO/2018/083298    International Application No.:    PCT/EP2017/078326
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Tue Nov 07 00:59:59 CET 2017
IPC: H04W 12/04
H04L 29/06
H04W 36/00
H04W 12/02
Applicants: KONINKLIJKE KPN N.V.
NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
Inventors: MIDDELESCH, Erwin, Willem
DE KIEVIT, Sander
Title: DERIVING A SECURITY KEY FOR RELAYED COMMUNICATION
Abstract:
A device (1) is configured to derive a first security key based on information relating to a first node (17), to request use of or to use a further device (9) as a relay to the mobile communication network and to determine whether the further device is connected to the first node and/or receive a message when another device, e.g. the first node, has determined that the further device is not connected to the first node. The device is further configured to, upon determining that the further device is not connected to the first node or upon receipt of the message, derive a second security key based on information relating to a second node (11) to which the further device is connected and transmit information via the further device, the information being encrypted using the second security key.