Question: What is the primary method of user authentication for accessing the Hosting Party Subscription Identity Module (HPSIM) application, as defined in the security architecture?
Option 1: Biometric Authentication (e.g., Fingerprint or Facial Recognition)
Option 2: Certificate-Based Authentication (using Public Key Infrastructure)
Option 3: Knowledge-Based User Authentication (PIN, with usage qualifier '08')
Option 4: Token-Based Authentication (requiring a physical token device)
Explanation: The correct answer is Option 3 because the security architecture for HPSIM specifies knowledge-based user authentication using a Personal Identification Number (PIN), aligning with standards for such methods.