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1. (WO2018137824) METHODS, APPARATUSES, COMPUTER PROGRAMS AND CARRIERS FOR SECURITY MANAGEMENT BEFORE HANDOVER FROM 5G TO 4G SYSTEM

Pub. No.:    WO/2018/137824    International Application No.:    PCT/EP2017/081687
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Thu Dec 07 00:59:59 CET 2017
IPC: H04W 12/04
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: JOST, Christine
WIFVESSON, Monica
BEN HENDA, Naomen
LEHTOVIRTA, Vesa
Title: METHODS, APPARATUSES, COMPUTER PROGRAMS AND CARRIERS FOR SECURITY MANAGEMENT BEFORE HANDOVER FROM 5G TO 4G SYSTEM
Abstract:
A key management is provided that enables security activation before handing over a user equipment from a source 5G wireless communication system, i.e., a Next Generation System (NGS), to a target 4G wireless communication system, i.e., a Evolved Packet System (EPS) / Long Term Evolution (LTE). The key management achieves backward security, i.e., prevents the target 4G wireless communication system from getting knowledge of 5G security information used in the source 5G wireless communication system.