It is certainly insecure compared to the normal channels for sharing classified information. The US government maintains a network that is cut off from the rest of the internet (more or less, there’s some nuances). The only way to access it is through a SCIF room. So they aren’t just using encryption for sending data, they are also using physical layer security. You can’t hack what you can’t reach, after all.
Comments
It is certainly insecure compared to the normal channels for sharing classified information. The US government maintains a network that is cut off from the rest of the internet (more or less, there’s some nuances). The only way to access it is through a SCIF room. So they aren’t just using encryption for sending data, they are also using physical layer security. You can’t hack what you can’t reach, after all.