you know as much as i love tech i still marvel at how some of the most advanced
complicated devices ever invented can be
defeated by crude simple instruments and
perhaps nothing demonstrates this idea better than the faraday cage essentially
a metal container that blocks wireless signals
but wait a minute Linus metal i mean it kind of makes sense to me why
thick concrete is bad for your cell signal but wouldn't metal just like
conduct electricity well okay of course yes it does which is
why you shouldn't stand outside with a festivus pool during a thunderstorm but
that doesn't mean that metal will allow radio waves to pass through it you see a
faraday cage works because radio waves move through electric fields which
interact with the charges that are naturally present in metal electric
fields push positive charges away from them meaning that when they hit a
faraday cage negative charge collects on the side of the cage nearest the signal
source while positive charge accumulates on the other side because the incoming
field is oriented in a positive to negative direction now since the charges
in the metal have now oriented themselves in the opposite direction
they produce their own electric field going the other way meaning that they
cancel each other out inside the cage and the radio waves can't pass through
it the simplicity with which a faraday cage can be constructed has led them to
appear in plenty of electronic applications notably in microwave ovens
where they keep radiation from leaking out into your kitchen and turning you
into a human hot pocket you've probably also seen smaller
faraday cages for sale in the form of rfid blockers which purport to shield
your credit cards from attackers who might try to steal information off of
them with scanners and although it's actually pretty difficult for identity
thieves to use this information as the rfid chips inside of cards don't contain
enough information on their own to do much real damage the market for these
protective sleeves and wallets is thriving nonetheless
another less obvious example is the metal layer commonly found inside the
cables for your electronics these serve as a shield around the
copper wire that actually transmits the signal this shield is effectively a
tubular faraday cage that keeps external signals from getting into the wire and
screwing up your content as well as preventing its own signals from escaping
and interfering with your other wires and gadgets and one of the coolest things about
faraday cages is that due to their simplicity there are some really
interesting diy applications some folks out of concern for their
personal privacy for example will keep their cell phone in a metal container
while charging also uk police have advised people with
wireless ignition systems to keep their keys in a similar enclosure to prevent
what's called relay car theft where thieves read the signal off of your key
fob from outside the house start your car and then drive away
and another common use is wannabe criminals lining their shopping bags or
pockets with foil to try to prevent the rfid tags on stolen items from setting
off alarms when they leave the store though before you run out and try that
one many retailers are wise to this technique and have
installed metal detectors to defeat these so-called booster bags
on that note if you're building your own for whatever reason faraday cages can't
shut everything out and it should be noted that any holes in the cage need to
be smaller than the signal wavelength to attenuate outside broadcasts so in some
situations one phone might work inside a faraday
cage while another one might not due to different carriers using different
frequencies this is something that you may have noticed in nature's
unintentional faraday cage the metal elevator so we recommend a more
purpose-built solution for your faraday cage needs kfc of all companies is
offering a faraday tent that it calls the internet escape pod for the low
price of what five thousand dollars
why do they even sell this what are they even
i mean at that price i hope it at least comes
with extra gravy synergy ii is designed to be easier and
more seamless to use than synergy one synergy is a mouse and keyboard sharing
software that works on Windows mac and Linux computers with features like being
able to share from anywhere so you can automatically control any other computer
without reconfiguring ssl encryption to protect your keystrokes from attackers
dynamic networking which intelligently detects the best route based on your
networking setup and the ability to always run in the background on all
operating systems so you can just set and forget it if you get the pro version
you can even get access to other cool features like clipboard sharing dragging
and dropping files copy pasting lock screen synchronization and tons more so
get 50 off synergy 2 today at the link in the video description so thanks for
watching guys if you disliked this video you can hit that button but otherwise
hit like get subscribed check out our other channels and leave a comment if you have suggestions for future fastest
possibles