Question: In an IOPS (Isolated Operation for Public Safety) network based on the Local EPC approach, what is a key characteristic of the security credentials used by the USIM application dedicated exclusively for IOPS operation in an IOPS-enabled UE?
Option 1: Shared security credentials with those used for 'normal' operation, but with an additional temporary key.
Option 2: A distinct set of security credentials, including a permanent key K uniquely assigned for IOPS operation.
Option 3: Dynamic security credentials generated at the start of each IOPS session.
Option 4: Security credentials that are provisioned only in the UICC and not in the Local HSS.
Explanation: This is correct because the USIM application for IOPS operation uses a distinct set of security credentials separate from those used for 'normal' operation, which includes at least a permanent key K uniquely assigned for IOPS operation, ensuring isolation and security of IOPS operations.