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Date: 1999-11-28
TEMPEST und die NSA-.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- Bildschirmabstrahlung als Angriffspunkt für elektronische Lauschattacken. Das posting ging an die [ziemlich karätig besetzte] ukcrypto mailing list, was den letzten Abschnitt verständlich macht. Dass jede Recherche zu TEMPEST in Cambridge beginnen sollte, ihr Ende aber sei in Fort Meade, ist dann klar, wenn man weiß, dass Ross Anderson [auch auf der Liste ist ] von der Uni Cambridge ziemlich gut über TEMPEST Phänomene Bescheid weiss, mehr als er wissen wahrscheinlich nur die Herren von der in Fort Meade ansässigen NSA. -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- The world-class Tempest experts on this list will excuse my temerity of clumsily pursuing the topic. Response from outside the would be welcome to supplement a few inquiries we've made in the US. Is it not the case that "anti-Tempest" is a redundancy, "Tempest" meaning measures taken against compromising emanations from electronic equipment, cabling, wiring, peripherals, even from metal objects such as radiators and piping which may serve as antenna-like devices (your house wiring may be broadcasting your most intimate cyber- secrets, pre- and post-encryption.) There are Tempest products available in the commercial market, many of which have evolved from military, intel and law enforcement programs. However, the most effective of them do not rise to the level of military requirements and even then are export restricted. Is that the case elsewhere? As an alternative to the traditional Faraday cage we mention a type which is available. That is the metalized fabric tent or portable shielded enclosure. A US company, BEMA, makes portable enclosures of various sizes, including desktop models. Have a look: http://cryptome.org/bema-se.htm The head of BEMA says there has been a substantial increase in purchases of their products recently, in the US and outside (exports to NATO mil/gov/gov-contractors are permissable). For more technical details there's an August 1999 paper, "Analysis of Shielded Tents and Other Electrically Thin Shielded Rooms:" http://www.emcs.org/pdf/99symp/00027.pdf (5 pp., 738K ! ) We must call attention to what is probably the most informative Web site on publically available Tempest information at: http://www.eskimo.com/~joelm/tempest.html There you discover links to more information than can be consumed in a sitting, the exemplary work at Cambridge centered in the table. The threat to cryptographic security of Tempest technology is a story worth writing, super-ept much needed, an interview which should begin in Cambridge and end in Ft. Meade. -.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- - -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- edited by Harkank published on: 1999-11-28 comments to office@quintessenz.at subscribe Newsletter - -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- -.-. --.- 
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