> Point being: SCIFs are the right tool for the job. Smartphone apps like Signal are not.

The job in this case seems to be secure, ad-hoc communication between multiple parties while on the road (the VP at least was doing an event in Michigan). Clearly a public smartphone app isn't the right tool for the job. Is a SCIF the right tool though? I always thought of SCIFs as purpose-built rooms. It seems impractical that every time a message needs to be communicated, the parties have to be whisked away to a SCIF.