Patent · US Active

Protection of initial non-access stratum protocol message in 5G systems

US11877149B2 · kind B2 · utility

1Cited by

0References

20Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Alexandre Saso Stojanovski · Paris, FR
Robert Zaus · Munich, DE
Farid Adrangi · Lake Oswego, US
Raimund Wloka · Langenzenn, DE
Abhijeet Kolekar · Portland, US
Ahmed M. Soliman · Munich, DE

Key dates

Filing date	Sep 13, 2019
Grant date	Jan 16, 2024
Priority date	—
Expiry date	Sep 25, 2040

Classification

Technology area (CPC H)Electricity
CPC primaryH04W84/042
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Systems and methods of protecting an initial NAS message are described. Depending on whether a security context for a serving PLMN is stored, the UE uses either a public key from the serving PLMN or a key from the security context to encrypt parts of the initial NAS message. An initial NAS message containing the encrypted parts is then sent to an AMF of the serving PLMN. The serving PLMN public key is transmitted via a SIB. Prior to transmission of the initial NAS message or in parallel with it, an RRC message is sent to the base station. The RRC message contains the UE identifier and/or a NSSAI encrypted using the serving PLMN public key.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.