WEBVTT

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you know as much as i love tech i still marvel at how some of the most advanced

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complicated devices ever invented can be

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defeated by crude simple instruments and

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perhaps nothing demonstrates this idea better than the faraday cage essentially

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a metal container that blocks wireless signals

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but wait a minute Linus metal i mean it kind of makes sense to me why

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thick concrete is bad for your cell signal but wouldn't metal just like

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conduct electricity well okay of course yes it does which is

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why you shouldn't stand outside with a festivus pool during a thunderstorm but

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that doesn't mean that metal will allow radio waves to pass through it you see a

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faraday cage works because radio waves move through electric fields which

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interact with the charges that are naturally present in metal electric

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fields push positive charges away from them meaning that when they hit a

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faraday cage negative charge collects on the side of the cage nearest the signal

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source while positive charge accumulates on the other side because the incoming

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field is oriented in a positive to negative direction now since the charges

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in the metal have now oriented themselves in the opposite direction

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they produce their own electric field going the other way meaning that they

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cancel each other out inside the cage and the radio waves can't pass through

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it the simplicity with which a faraday cage can be constructed has led them to

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appear in plenty of electronic applications notably in microwave ovens

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where they keep radiation from leaking out into your kitchen and turning you

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into a human hot pocket you've probably also seen smaller

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faraday cages for sale in the form of rfid blockers which purport to shield

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your credit cards from attackers who might try to steal information off of

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them with scanners and although it's actually pretty difficult for identity

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thieves to use this information as the rfid chips inside of cards don't contain

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enough information on their own to do much real damage the market for these

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protective sleeves and wallets is thriving nonetheless

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another less obvious example is the metal layer commonly found inside the

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cables for your electronics these serve as a shield around the

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copper wire that actually transmits the signal this shield is effectively a

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tubular faraday cage that keeps external signals from getting into the wire and

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screwing up your content as well as preventing its own signals from escaping

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and interfering with your other wires and gadgets and one of the coolest things about

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faraday cages is that due to their simplicity there are some really

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interesting diy applications some folks out of concern for their

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personal privacy for example will keep their cell phone in a metal container

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while charging also uk police have advised people with

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wireless ignition systems to keep their keys in a similar enclosure to prevent

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what's called relay car theft where thieves read the signal off of your key

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fob from outside the house start your car and then drive away

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and another common use is wannabe criminals lining their shopping bags or

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pockets with foil to try to prevent the rfid tags on stolen items from setting

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off alarms when they leave the store though before you run out and try that

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one many retailers are wise to this technique and have

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installed metal detectors to defeat these so-called booster bags

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on that note if you're building your own for whatever reason faraday cages can't

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shut everything out and it should be noted that any holes in the cage need to

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be smaller than the signal wavelength to attenuate outside broadcasts so in some

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situations one phone might work inside a faraday

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cage while another one might not due to different carriers using different

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frequencies this is something that you may have noticed in nature's

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unintentional faraday cage the metal elevator so we recommend a more

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purpose-built solution for your faraday cage needs kfc of all companies is

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offering a faraday tent that it calls the internet escape pod for the low

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price of what five thousand dollars

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why do they even sell this what are they even

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i mean at that price i hope it at least comes

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with extra gravy synergy ii is designed to be easier and

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more seamless to use than synergy one synergy is a mouse and keyboard sharing

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software that works on Windows mac and Linux computers with features like being

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able to share from anywhere so you can automatically control any other computer

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without reconfiguring ssl encryption to protect your keystrokes from attackers

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dynamic networking which intelligently detects the best route based on your

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networking setup and the ability to always run in the background on all

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operating systems so you can just set and forget it if you get the pro version

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you can even get access to other cool features like clipboard sharing dragging

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and dropping files copy pasting lock screen synchronization and tons more so

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get 50 off synergy 2 today at the link in the video description so thanks for

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watching guys if you disliked this video you can hit that button but otherwise

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hit like get subscribed check out our other channels and leave a comment if you have suggestions for future fastest

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