[GreenKeys] TEMPEST teletype gear

[John Nagle]

> From: Roy Morgan <k1lky at earthlink.net>
> Subject: Re: [GreenKeys] Dovetron Tempest  MPC-1000T II
> To: Michael O'Day <odaymg at yahoo.com>
> 
> On Apr 23, 2010, at 11:19 AM, Michael O'Day wrote:
> 
>> I found a Dovetron Tempest  MPC-1000T II on ePay, but the  

> 
> The "T" stands for "Tempest", which in turn stands for "... a U.S.  
> government code word that identifies a classified set of standards for  
> limiting electric or electromagnetic radiation emanations from  
> electronic equipment."
> (See: http://www.eskimo.com/~joelm/tempestintro.html )
> ...  Bruce Gabrielson, who has been in the TEMPEST biz for ages, has a  
> nice unclassified general description of TEMPEST  (at http://206.102.92.130/ses/papers/TEMPEST/Whatis.html 
>   - this link does not work for me at the time I'm writing.)
> 
> Basically is is a collection of methods to keep signals from inside  
> the equipment from being detected at some distance. A normal teletype  
> setup with non-tempest equipment might be eaves-dropped upon from  
> perhaps a few hundred feet away, or even much more if conditions are  
> right. (that's an uninformed guess, NOT based on any experience)

    TEMPEST issues for the Teletype era were declassified a few years ago.
See "http://www.nsa.gov/public_info/_files/cryptologic_histories/history_comsec.pdf"

Start at page 89.

					John Nagle