Who acts as the USCG Service Authority (SA) and exercises overall authority for USCG COMSEC matters?

• A. COGARD TISCOM (TIS-332)
• B. ISIC
• C. EKMS Manager
• D. LE Personnel

Answer: (A)

The key idea is that the Service Authority is the top COMSEC oversight within a service, responsible for policy, compliance, and overall direction of COMSEC matters. For the U.S. Coast Guard, that authority rests with the Coast Guard Telecommunications Information Systems Command, CG-TISCOM (TIS-332). This office sets COMSEC policy, approves procedures, oversees key management, maintains inventories, and coordinates with NSA/CSS as needed. It designates and supervises EKMS roles at the command level to ensure proper handling of crypto material across the fleet andshore units. Other roles exist within the COMSEC framework, such as the EKMS Manager who runs the EKMS program locally or ISICs who handle information security for systems, but they do not carry the service-wide authority.