Patent ID: 11863982
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A cellular wireless network entity of a cellular wireless network, the cellular wireless network entity comprising:
wireless circuitry configurable for wireless communication with a user equipment (UE); and
processing circuitry communicatively coupled to the wireless circuitry and comprising a processor and a memory storing instructions, the cellular wireless network entity configured to:
transmit, to the UE as part of an attach procedure, an authentication failure indication associated with an initial subscription concealed identifier (SUCI) related to a subscription permanent identifier (SUPI);
receive, from the UE, an uplink (UL) message that includes a fallback subscription concealed identifier (SUCIFB); and
establish a secure connection with the UE,
wherein the UE generates the fallback SUCIFB by encryption of the SUPI based at least in part on a symmetric fallback encryption key (KFB) or an asymmetric fallback public key (PKFB) provisioned to the UE by the cellular wireless network entity or by another network entity of the cellular wireless network.