Faraday bags and other scarey things

Dec 28, 2022 Last reply: 3 years ago 35 Replies

If you read

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"How do keyless car thefts work?" (in the first post) the method gives the car the code from a legitimate fob at the time the theft takes place.

Rolling code? That is the code the car gets.

That isn't possible with the rolling code system.

But it is different every time, that's where the name ROLLING comes from.

I have to chime in... as with everything technical or electronic, people have to know how these things work. With more knowledge they become less scary.

All keyless cars emitt a weak radio signal that shouldn't extend over

5-10 meters around the car. The idea is to 'trigger' the keyfob in your pocket as you approach your car.

Once your keyfob picks up the signal from the car, it sends back its own signal. This is how the 'greeting function' is realised. When you grab the door handle, the car senses it and sends a radio signal to the keyfob, which responds then. If the exchanged codes match, the car unlocks the door. Same happens when you press the START button.

On some keyfobs, you can see a small LED light up when it responds the car's signal.

The thieves abuse this systems be having a receiver next to your car and grabbing the door hanlde. This receiver picks up the signal of the car and relays it to a second device with has to be near your keyfob. This second device sends the relayed signal to your keyfob, which responds, thinking it heard the car's signal. And this answer gets relayed back to the first device near the car... and the car thinks, it got the answer from the keyfob ...

In essence, it is a design flaw (bug), becaus nobody thought about these relaying schemes ...

"at the time the theft takes place"

You have not read the cited source or it is too difficult for you to understand.

When the scheme is being run it gets a 'fresh' rolling code from an authorized fob and sends it to the car.

Everyone seems to understand but you.

Changes nothing.

You are just plain wrong about both.

Wrong.

Wrong.

If it was that easy, all cars with buttonless fobs would be stolen and that doesn't happen.

Proximity sensor, very short range.

If my car had a dead battery, I could unlock it with my real key and boot it up from my little lithium thing. Or at least get inside, out of the rain and snow.

Imagine freezing to death because your car won't let you in.

Cutting to the chase....

Who, here, has had an *DIRECT* experience with car-theft-by-cloning?

Peter Wieck Melrose Park, PA

Not by cloning, but remotely related.

We knew someone who had a car stolen from their driveway. The thief used a remote to open the garage door, entered the house and grabbed the car keys off a hook on the wall. I think they grabbed a couple laptops etc but were gone in 60 seconds in the car. They were seen on a neighbors security camera but I don't think were ever caught.

Because when a thread such as this one gets to 41 (including this one) posts that are 100% speculative, then one suspects that there is no direct experience behind it.

Peter Wieck Melrose Park, PA

Because they were the thieves, of course!

Cheers

Phil Hobbs

Not direct but my neighbor's Mercedes was stolen that way.

Neighbor. Friend. Third Cousin, twice removed.

i.e.: No credible direct experience.

That something is possible - meteor strike, lightening strike, hitting the billion-dollar lottery, does not make it likely. Or, even, a credible threat, excepting pure blind luck and/or stupidity.

Peter Wieck Melrose Park, PA

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Once again - NOT DIRECT!

Peter Wieck Melrose Park, PA

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