JWICS is the computer network the US government uses to handle top secret and sensitive compartmented information.
https://en.wikipedia.org/wiki/Joint_Worldwide_Intelligence_Communications_System
“Top Secret” signifies information “the unauthorized disclosure of which reasonably could be expected to cause 'exceptionally grave damage' to the National Security.” “Sensitive compartmented information” or SCI is a protocol for restricting access to information to those with a specific need-to-know. This is, according to the US government, really important information that must be carefully protected.
That’s why access to JWICS is typically restricted to a sensitive compartmented information facility, or SCIF. A SCIF is set up to protect that information from unauthorized access, observation, electronic monitoring, etc etc etc. *Really carefully protected secrets*. No cameras, no removable storage devices, no smart devices that can communicate electronically, etc.
https://en.wikipedia.org/wiki/Sensitive_compartmented_information_facility