As follow-up of the recent discussion of RF detection, we've put a 1995 article on data security in buildings at: http://jya.com/datasec.htm It describes architectural measures to protect data beyond that provided by encryption. We offered this article by E-mail in 1995. Ta-da: a request came from DOJ. It cautions that the global snooping is booming, so what worked in 1995 may be Moscow-Embassy Potemkin: for security hire an ex-KGB spookitect!