[seanhunter]

One thing that most people should use a Faraday pouch for (in my opinion) is storing your key fobs if your vehicle uses keyless ignition with a fob. This prevents a very common relay attack which is to stand with a laptop by someone's front door and relay the keyfob signal between the keys (somewhere inside the person's house) and the car. For people who live in cities where you park on the street (as I do) it's extra-convenient for thieves in that most cars will flash some lights to say the alarm is disabled so the thieves know which car they just unlocked.

[skunkworker]

I was also thinking about this, after seeing this reddit thread of a woman putting a device in front of a doorbell.

https://www.reddit.com/r/whatisthisthing/comments/r7kb03/my_...

[seanhunter]

Yeah a work colleague had his car stolen and his door cam recorded the thieves kind of waving a laptop about in front of it. I guess the antenna they use is highly directional so you have to get it just right to trigger.

The apple watch unlock feature in recent macOs versions apparently avoids this relay attack by using a high-precision timer so they know (given the speed of light) that the watch is very close and the signal could not be relayed from a watch that's further away by a mitm (because the timestamp would be too old). I guess car keyfobs don't do this kind of thing because the electronics are intentionally quite primitive to avoid excessive battery drain.