Information Security Stack Exchange is a question and answer site for information security professionals. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

This French website reports that a wifi-absorbing wallpaper provides a security benefit. Is there any legitimate support for this, assuming that most rooms have windows, and signal can escape from there?

share|improve this question
It helps reduce interference and RF signals seepage outside your required area/zone. – Teddy Oct 9 '12 at 22:28
Keep in mind that this "absorption" is far from complete. It merely helps absorb RF the same way my curtains "absorb" that Saturday morning daylight... – Matthew Peters Nov 6 '14 at 15:20
up vote 9 down vote accepted

If wallpaper absorbs RF energy and not reflects, then the only way to gain access to wifi is by a direct line of sight through the window. And I would never call Wifi absorbing wallpaper a security measure. Its primary purpose is to reduce interference.

share|improve this answer
+1. Drop a microcomputer that has a cellular interface nearby or inside the walls and everything was just undone. This attack is also known as the, "Mail an iPhone with custom firmware," attack. High gain antennas also work. The wallpaper produce a defined db loss, but that can be made up for. Much better for interference help and being a good neighbor than for security. – Jeff Ferland Oct 9 '12 at 22:11
@JeffFerland is there any documented usage of this technique? I never thought of it... – LamonteCristo Oct 12 '12 at 15:21

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.