[Full-disclosure] Tempest today
sil at infiltrated.net
Mon Aug 21 18:56:36 BST 2006
Bryan_McAninch at McAfee.com wrote:
> Interesting link, thanks. :)
> Perhaps Van Eck was the first to research EMR eavesdropping of CRT
> screens... ?
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.
sil . infiltrated @ net http://www.infiltrated.net
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