# Stealth wallpaper

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{{Use dmy dates|date=December 2017}}
{{Use British English|date=December 2017}}
For computer [network security](/source/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 Systems](/source/BAE_Systems)<ref>[http://www.azom.com/news.aspx?newsID=1791 Azcom: Stealth Wallpaper Prevents Wi-Fi Signals Escaping without Blocking Mobile Phone Signals]</ref>
In 2012, ''[The Register](/source/The_Register)'' reported that a commercial wallpaper had been developed by [Grenoble Institute of Technology](/source/Grenoble_Institute_of_Technology) 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.<ref>[https://www.theregister.co.uk/2012/05/10/wifi_blocking_wallpaper_houses_homes_from_hackers/ The Register: Wifi Blocking Wallpaper]</ref>

== See also ==
* [Electromagnetic shielding](/source/Electromagnetic_shielding)
* [Faraday cage](/source/Faraday_cage)
* [TEMPEST](/source/Tempest_(codename))
* [Wallpaper](/source/Wallpaper)
* [Wireless security](/source/Wireless_security)

== References ==
{{reflist}}

== External links ==
* [http://www.azom.com/news.aspx?newsID=1791 Azcom: Stealth Wallpaper Prevents Wi-Fi Signals Escaping without Blocking Mobile Phone Signals]
* [https://www.theregister.co.uk/2012/05/10/wifi_blocking_wallpaper_houses_homes_from_hackers/ The Register: Wifi Blocking Wallpaper]

{{BAE Systems}}

Category:BAE Systems research and development
Category:Computer network security
Category:Wi-Fi
Category:Wallpaper

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Adapted from the Wikipedia article [Stealth wallpaper](https://en.wikipedia.org/wiki/Stealth_wallpaper) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Stealth_wallpaper?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.