. . "For computer network security, 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."@en . . "1932"^^ . . . . . . . . "4194311"^^ . . . . . . . "Stealth wallpaper"@en . . . "1083935882"^^ . . . . . . . . "For computer network security, 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 SystemsIn 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. Nevertheless, it does allow GSM and 4G signals to pass through the network, therefore allowing cell phone use to remain unaffected by the wallpaper."@en . . .