[GreenKeys] Teletype and TEMPEST info

[Duncan Brown]

Ed,

Emanations from crypto gear was first noticed by Bell Labs during WWII. 
The signals were showing up on test equipment elsewhere in the lab!

See this declassified report from NSA:
https://www.nsa.gov/news-features/declassified-documents/cryptologic-spectrum/assets/files/tempest.pdf
(the URL is also on Nick's new TEMPEST page)

Have fun,

Duncan
K2OEQ

On 22-Oct-16 22:31, Ed Sharpe Archivist for SMECC via GreenKeys wrote:
> Thanks - - yea I imagine  the tty ( any model) is pretty electrically 
> signal active  with spillover that   could be listened in  to....  be 
> interesting to see if there are any lab studies on  this  Nick.
> Interesting  topic!
> You ever see a tempest HP laser printer?   they  even had special 
> enclosures  for the font cartridges...
> Ed#  www.smecc.org
> In a message dated 10/22/2016 6:42:29 P.M. US Mountain Standard Time, 
> navy.radio at gmail.com writes:
>
>     Hi gang - Some Model 28 equipment was designed to reduce
>     electromagnetic radiation that could compromise crypto operations.
>     I've started a page with some info and would welcome corrections,
>     more info, links, etc. Some places I am just extrapolating from a
>     little info...
>     http://www.navy-radio.com/tty-tempest.htm
>
>     Cheers,
>     Nick England K4NYW
>     www.navy-radio.com <http://www.navy-radio.com/>
>
>
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