TEMPEST protection (was Rolm Computers: 1602, 1602A, 1602B, 1666, MSExx)

[Paul Anderson]

The actual Tempest specs used to be classified.

On Thu, May 5, 2016 at 8:17 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:

>     > From: Erik Baigar
>
>     > very interesting reading
>
> If you want to see a great example of why it was important, check out the
> so-called 'Berlin Tunnel':
>
>   https://en.wikipedia.org/wiki/Operation_Gold
>   http://www.fas.org/irp/cia/product/tunnel-200702.pdf
>
> Some of the traffic that was intercepted was teletype traffic - which had
> been encrypted. However, the equipment that connected the gear to the line
> allowed a tiny electronic whisper of the original plain-text onto the line,
> along with the encrypted form, and it was possible to read the plaintext
> off
> the line with suitable gear.
>
>         Noel
>