Where may classified information be discussed between authorized persons?

• A. In elevators if only authorized persons are on the elevator
• B. In a restricted area
• C. On cell phones in restricted areas
• D. On secure telephones

Answer: (D)

When discussing classified information, use an approved secure channel to protect the content from interception. A secure telephone is designed with encryption and access control so that only authorized individuals connected to the line can participate, and the conversation is protected from eavesdropping and leakage in transit. Physical security in a restricted area helps, but it doesn’t guarantee the conversation won’t be overheard or intercepted, and elevators or cell phones in restricted areas present additional risks. Therefore, the secure telephone is the appropriate, protected way for authorized persons to discuss classified information.