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Stealth wallpaper is a material designed to prevent an indoor Wi-Fi network from extending or "leaking" to the outside of a building, where malicious persons may attempt to eavesdrop or attack a network. While it is simple to prevent all electronic signals from passing through a building by covering the interior with metal, stealth wallpaper accomplishes the more difficult task of blocking Wi-Fi signals while still allowing cellphone signals to pass through. The first stealth wallpaper was originally designed by UK defense contractor BAE Systems 〔(Azcom: Stealth Wallpaper Prevents Wi-Fi Signals Escaping without Blocking Mobile Phone Signals )〕 In 2012, ''The Register'' reported that a commercial wallpaper had been developed by Institut Polytechnique Grenoble and the Centre Technique du Papier with planned sale in 2013. This wallpaper blocks three selected Wi-Fi frequencies, but nevertheless does allow GSM and 4G signals to pass through the network, therefore allowing cell phone use to remain unaffected by the wallpaper.〔(The Register: Wifi Blocking Wallpaper )〕 == See also == * Electromagnetic shielding * Faraday cage * TEMPEST * Wallpaper * Wireless security 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Stealth wallpaper」の詳細全文を読む スポンサード リンク
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