Question: What is the primary security function enabled by the reference point Ub between the User Equipment (UE) and the Bootstrapping Server Function (BSF)?
Option 1: Mutual Authentication and Session Key Bootstrapping using SIP Digest Credentials
Option 2: Encryption of Data Traffic between UE and BSF
Option 3: Authorization for Specific Network Services
Option 4: Secure Provisioning of UE Software Updates
Explanation: The reference point Ub facilitates mutual authentication between the User Equipment (UE) and the Bootstrapping Server Function (BSF), enabling the establishment of session keys based on SIP Digest credentials, securing subsequent communications.