[GreenKeys] tt-345a/fg reperf.. is this Army? Navy? need to find manual!

[COURYHOUSE at aol.com]

also Duncan thanks  for the Bell labs  link,,
 
 
ok do you know much about this>? also  know  where we can find  a manual?
 
 

 
 
In a message dated 10/23/2016 6:37:19 A.M. US Mountain Standard Time,  
duncanancy at earthlink.net writes:

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-spectru
m/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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