公开(公告)号：US11877149B2

公开(公告)日：2024-01-16

申请号：US17275980

申请日：2019-09-13

Applicant: Apple Inc.

Inventor： Alexandre Saso Stojanovski ,  Robert Zaus ,  Farid Adrangi ,  Raimund Wloka ,  Abhijeet Ashok Kolekar ,  Ahmed Soliman

IPC: H04W12/037 ,  H04W12/121 ,  H04W12/106 ,  H04L9/30 ,  H04W12/06 ,  H04W48/18 ,  H04W60/00 ,  H04W84/04

CPC classification number: H04W12/037 ,  H04L9/30 ,  H04W12/06 ,  H04W12/106 ,  H04W12/121 ,  H04W48/18 ,  H04W60/00 ,  H04L2209/34 ,  H04L2209/80 ,  H04W84/042

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.

公开(公告)号：US11863975B2

公开(公告)日：2024-01-02

申请号：US17290757

申请日：2019-10-30

Applicant: Apple Inc.

Inventor： Alexandre Saso Stojanovski ,  Robert Zaus ,  Farid Adrangi ,  Raimund Wloka ,  Abhijeet Ashok Kolekar ,  Ahmed Soliman ,  Sudeep K. Palat

IPC: H04L29/06 ,  H04W12/037 ,  H04W12/0431 ,  H04W12/041 ,  H04L9/30 ,  H04W48/10 ,  H04W74/08 ,  H04W84/04

CPC classification number: H04W12/037 ,  H04L9/30 ,  H04W12/041 ,  H04W12/0431 ,  H04W48/10 ,  H04L2209/80 ,  H04W74/0833 ,  H04W84/042

Abstract: Systems and methods of protecting an initial NAS message are described. The NAS message is encrypted using the home PLMN public key during initial registration with the network using a registration request message. An AMF of the serving PLMN sends a serving PLMN public key which is then used to encrypt information including an S-NSSAI of later initial NAS messages after initial registration is completed. The S-NSSAI may not be sent in the later initial NAS message if the S-NSSAI is provided at an access stratum level. The RRC message may contain an indication that the S-NSSAI is encrypted using the serving PLMN public key.