To access SIPR on the INMARSAT system, what is required?

• A. SIPR token plugged into a 90-meter card reader.
• B. KG-40A encryption.
• C. KG-175 with CIK.
• D. ES-19 crypto key.

Answer: (A)

Access to SIPR on INMARSAT hinges on hardware token authentication. The SIPR token serves as the possession factor that proves you’re authorized, and when it’s plugged into the compatible card reader, the system can verify your identity and grant access. Without the token and the reader, you can’t establish a SIPR session because the login authentication step cannot occur.

The other items are cryptographic tools used to protect traffic after access is granted or to manage keys, not to authenticate and unlock the SIPR network on INMARSAT. Encryption devices and crypto keys secure communications once you’re in, but they don’t replace the initial token-based login needed to access SIPR.