The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2024
Filed:
Oct. 30, 2019
Apple Inc., Cupertino, CA (US);
Alexandre Saso Stojanovski, Paris, FR;
Robert Zaus, Munich, DE;
Farid Adrangi, Lake Oswego, OR (US);
Raimund Wloka, Langenzenn, DE;
Abhijeet Ashok Kolekar, Hillsboro, OR (US);
Ahmed Soliman, Nuremberg, DE;
Sudeep K. Palat, Cheltenham, GB;
Apple Inc., Cupertino, CA (US);
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.