TEMPEST Questions...
-----BEGIN PGP SIGNED MESSAGE----- I'm writing an article on TEMPEST technology. The focus is on what TEMPEST is and how to defeat it, if possible. So far I've gotten some insightful information, but I'm looking for all I can get. Has anyone ever heard of TEMPEST being used in the continental US? Can anyone tell me what measures offer some level of protection, or steps that can be taken to reduce the likelihood of being successfully targeted? Has anyone ever seen TEMPEST in action? Any and all information will be greatly appreciated. I prefer responses via e-mail to dzeanah@holonet, but I also read this newsgroup pretty frequently. Thanks a lot. - -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.2 mQCNAi34pIYAAAEEALUNlIECc/SWho25DYEMwSAB0pEZsVro086ocA1eFmqfPUdb Mziw9z4lclX0DCznLzcYXzRBHQXYHclcSsPCn6lXYugmPdT8t5OkoqzN8mdU1iuH /YQZ79q1Iv+kufa0A8ZJn+9R/QmQnbxiOPJPOJzHYivd/hui70wIwf2qjF2hAAUR tCVEZXJlayBTLiBaZWFuYWggPGR6ZWFuYWhAaG9sb25ldC5uZXQ+iQCVAwUQLw3z i0wIwf2qjF2hAQGvawP/RSkJ0YSZX0MpeBMjo2BS9Qbsxs9iIS7/J1UesbNmR4ST 686EwPcpIMjiERJ425gXthOC7Jb7+39epkJkgoeuQqzj5FpnklpaGgG/2oyNbMKt EdysgkcufQm7lYMx4r/EOdW/PvLPL7cFBkCbdYRxOGmhy+iLnYrVRLqVNLteluI= =VD2n - -----END PGP PUBLIC KEY BLOCK----- -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBLw4n/EwIwf2qjF2hAQGcuQP/UtKXz0w3icEf3j094LpkOmr7t+miBcT4 9T0rsZ8UNz/Md7l4iY0sA929vU5IiZs58dTH0qiIVrFLf5qh0hzV+7edX6ARxccP ZSsdchd6g6LdRJn+s4QvOQT19TgcAGfW1p0lbVvDKGsh2+KmpQ4jHiLC3ugYq2x3 nqL4aY8dC4c= =L/Fy -----END PGP SIGNATURE----- ~~~ PGPBLUE 3.0 <NR> ... I don't see my signature anywhere on this "social contract" -- | Fidonet: Derek Zeanah 1:102/903 | Internet: Derek.Zeanah@f903.n102.z1.fidonet.org | via Borderline! uucp<->Fido{ftn}gate Project +1-818-893-1899
On 6 Jan 1995, Derek Zeanah wrote:
I'm writing an article on TEMPEST technology.
The focus is on what TEMPEST is and how to defeat it, if possible. So far I've gotten some insightful information, but I'm looking for all I can get.
Has anyone ever heard of TEMPEST being used in the continental US? Can anyone tell me what measures offer some level of protection, or steps that can be taken to reduce the likelihood of being successfully targeted? Has anyone ever seen TEMPEST in action?
You might start with van Eck, Wim, "Electromagnetic Radiation from Video Display Units: An Eavesdropping Risk?", Computers & Security 4 (1985) 269-286. That will give you the technical basics. If someone has actually seen Tempest interception in action, I'd like to hear about that as well. John A. Thomas jathomas@netcom.com N5RZP 214/263-4351
Hi all, Regarding Tempest, Something similar happens to me in my workshop. I have several computers stacked on two shelves. It is quite commen for several of them to be on at one time. In particular when I have my Amiga 1200 driving my NEC TV/Monitor I notice that it appears on the other composite video monitors even though the Amiga drives RGB. What I think is happening is that the NEC is converting the RGB to standard TV drive rates. The short of it is that I can watch my Amiga 1200 on my TV that is sitting a couple approx 3ft. from it. It could also be the fact that the 1200 has a video output that is poorly shielded. It is capable of driving a composite device directly as well. One aspect that is interesting is that if you have several sources going at once the quality degrades. One possible technique for defeating such monitoring would be to have a couple of standard video recorders drive a video game rf modulator tied to an antenna to provide a 'shell' of drivel from your cable feed. Your VCR may be able to drive the antenna directly. Take care.
participants (3)
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Derek.Zeanah＠f903.n102.z1.fidonet.org -
John A. Thomas -
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