Question: What is a requirement for the ISIM application regarding storage of session keys and related information in the Security Association (SA) when supporting IMS access security?
Option 1: The session keys and related SA information shall never be stored on the ISIM.
Option 2: The ISIM must store them securely to ensure seamless reconnection upon UE power-on.
Option 3: The ISIM should store them temporarily but encrypt them for added security.
Option 4: The session keys are stored, but related SA information is not.
Explanation: This requirement enhances security by ensuring sensitive cryptographic materials are not retained on the ISIM when not in use, aligning with the deletion of existing SAs at UE power off.