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All the old TEMPEST stuff probably works great when you're _inside_ the target's building.

If my (granted, very limited and anecdotal) experience is anything to go by, rather than TEMPESTifying a whole building, one rather hardens specific rooms or areas inside it.

Oh, and in those rooms bringing your own stuff from the outside is not encouraged - to the extent that I was asked to leave my disposable coffee cup outside on one occasion.

Didn’t matter much - there was an approved and vetted Moccamaster inside.

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