cdb wrote:
> I'm not sure why this is thought to be a new discovery, I recall many
> many years ago a demonstration by a BBC science program of reproducing
> what a user was doing by tuning in to the signals in the video cable.
> They uses the same technology that is used in the licence detector
> vans (more accurately signal detector vans). They could produce a
> fuzzy but clearly readable 'screenshot' .

Exactly.  That's the kind of thing Tempest was all about.

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