Three people recently asked me about Faraday cages (to prevent their phones from being tracked), probably because of this blog post from a few years ago: https://www.mattblaze.org/blog/faraday/
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Three people recently asked me about Faraday cages (to prevent their phones from being tracked), probably because of this blog post from a few years ago: https://www.mattblaze.org/blog/faraday/
Tl;dr:
- You probably don't need a Faraday cage. If you need to use your phone or have it on to receive calls/texts, a Faraday cage won't help you!
- The main use of a Faraday cage is to provide *assurance* that your phone is really off and not broadcasting your location.
- If you *do* need one, get a good one.
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Also, while I'm as much as gadget freak as anyone, "get yourself a Faraday cage" would probably be very low on my checklist of things to do to prepare for an authoritarian dictatorship.
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Also, if you've got this romantic idea that you're going to be some kind of superspy underground resistance operative staying one step ahead of The Man with your clever technology countermeasures, consider that ACTUAL TRAINED CIA SPIES have trouble doing this properly in practice, even for just a few weeks. See this talk from Blackhat 2013 https://www.youtube.com/watch?v=LWtbwMp7Zh8
