Question: What NAS algorithms will an AMF use for unauthenticated UEs in Limited Service Mode (LSM) when establishing bearers for emergency sessions?
Option 1: NIA2 and NEA2
Option 2: NIA0 and NEA0
Option 3: EIA0 and EEA0
Option 4: Any supported algorithm announced by the UE
Explanation: According to the security architecture for 5G systems, when an AMF allows unauthenticated UEs in LSM to establish bearers for emergency sessions, it shall use NIA0 and NEA0 as the integrity and ciphering algorithms respectively. This is a specific requirement to ensure secure communication for emergency services even when the UE cannot be authenticated.