Comment on What security purpose a Faraday bag has when it contain a vehicle keyfob
Death_Equity@lemmy.world 1 day ago
The fob doesn’t turn off.
The car is always calling out for a response and the key “hears” the call and responds with their agreed upon codeword.
A faraday is like plugging the key’s ears and putting a gag in its mouth. It can’t hear or say anything.
ReginaPhalange@lemmy.world 20 hours ago
… Which means that if the hacker is near you when you park - there is a time period where the fob isn’t masked by the bag, because it is coming out of the ignition, and voulaa - you can record the key’s pong of the car’s ping, retransmit, and get in. Correct?
DABDA@lemm.ee 18 hours ago
voilà
tuck182@lemmy.world 15 hours ago
Modern fobs should be designed to prevent replay attacks (there should be something specific in the request that alters the response), so it shouldn’t be possible to record a response and then use it later.
Death_Equity@lemmy.world 20 hours ago
That is a possibility if you aren’t normally keeping it in the bag unless being needed in the moment.
It is far more common for the attempted theft to occur late at night because thieves avoid greater risk.