Re: Tempest today

["J. Oquendo" <sil () infiltrated net>]

Bryan_McAninch () McAfee com wrote:
> Interesting link, thanks. :)
>
> Perhaps Van Eck was the first to research EMR eavesdropping of CRT
> screens... ?
>   
Nope:

Abstract:       A system for preventing the remote detection and decoding of computer data from RF or conducted signal 
emissions is disclosed. A simulator is coupled to the computer for emulating signal emissions in order to mask the 
computer signal emissions. The simulator includes an emulation generator coupled to the computer to radiate signals 
that fully emulate those radiated by the computer to be protected. The emulated signal emissions are synchronized with 
the computer signal emissions by a special control unit which receives
timing instructions from the computer. A random sequence generator randomizes and convolutes the sequence of the 
emulated signal emissions so that the composite signal emissions formed by the computer and the simulator cannot be 
decoded to render meaningful data indicative of that being processed by the computer. The simulator is coupled with a 
computer to be protected by connection to the I/O interface port of the computer.
        

US Patent References:   
2476337 Jul., 1949      Varian.

Go to www.uspto.gov and do a patent search. You will see an image explaining this from 1949. Wim Van Eck probably 
wasn't even in diapers then.


====================================================
J. Oquendo
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x1383A743
sil . infiltrated @ net http://www.infiltrated.net 

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