PKI develops, supplies and installs bugproof rooms worldwide. This reliable and durable protection against eavesdropping attacks is nowadays necessary for every conference room. Interference attacks are no longer limited to 100m. Eavesdropping technology has been revolutionized by GSM technology (see PKI catalogue). The room screening system comprises HF-screening and acoustic insulation including air conditioning, electrical installation and furniture. Screening is totally invisible for the user. Furthermore, we are prepared to supply bug-proof booths ready to use.