Question: What should an NF do if the purpose of data processing is not explicitly stated in a service request?
Option 1: Accept the service request and process the data without user consent.
Option 2: Deny the service request and do not process the data.
Option 3: Request the purpose of data processing from the user or otherwise deny the service.
Option 4: Retrieve the user consent parameters from the UDM to determine the purpose of data processing.
Explanation: According to the security architecture for 5G systems, if the purpose of data processing is not implicitly known from the service request, the NF that is deemed an enforcement point for user consent shall request it or otherwise deny the service. This ensures that user consent is obtained before any data processing takes place, protecting the user's privacy and security.