Invention Grant
- Patent Title: Securing network steering information
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Application No.: US16604875Application Date: 2018-10-01
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Publication No.: US11838754B2Publication Date: 2023-12-05
- Inventor: Vesa Torvinen , Ivo Sedlacek , Monica Wifvesson
- Applicant: Telefonaktiebolaget LM Ericsson (publ)
- Applicant Address: SE Stockholm
- Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
- Current Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
- Current Assignee Address: SE Stockholm
- Agency: BAKER BOTTS L.L.P.
- International Application: PCT/EP2018/076679 2018.10.01
- International Announcement: WO2019/068654A 2019.04.11
- Date entered country: 2019-10-11
- Main IPC: H04W12/06
- IPC: H04W12/06 ; H04L9/32 ; H04W12/10 ; H04W60/00 ; H04W84/04

Abstract:
According to certain embodiments, a method by a user equipment (UE) for securing network steering information includes transmitting a registration request to a Visited Public Land Mobile Network (VPLMN). Upon successful authentication b an authentication server function (AUSF), a home network root key is generated. A protected message comprising Network Steering information is received from a first network node. The protected message is protected using a configuration key (Kconf) and a first Message Authentication Code (MAC-1). The configuration key (Kconf) is determined from the home network root key, and the UE verifies the MAC-1. Based on the Kconf and the MAC-1, it is verified that the VPLMN did not alter Network Steering Information. An acknowledgement message, which is protected with a second Message Authentication Code (MAC-2), is transmitted to a Home Public Land Mobile Network (HPLMN).
Information query