this post was submitted on 10 Feb 2024
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Canada to ban the Flipper Zero to stop surge in car thefts::The Canadian government plans to ban the Flipper Zero and similar devices after tagging them as tools thieves can use to steal cars.

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[–] [email protected] 6 points 8 months ago (2 children)

Isn't that because it can desync the actual keyfob?

Nvm... Clicked the link. That's exactly why you shouldn't do that.

[–] [email protected] 2 points 8 months ago

That is my understanding and why I haven’t ventured into that area with my personal vehicles yet.

[–] [email protected] 1 points 8 months ago (1 children)

Ah, so the cars still have shitty security implementations, only now it's in the direction of "car needs service if someone tries to playback a previous signal".

Though how does it work when you hit the button while out of range of the car?

It should be each fob has a private key that is used to generate a cryptographic hash of a random challenge string. Or hell, even give a rolling code a sequence number so they the car and fob can resync if necessary (I don't think this would break the security, since the sequence could be started at a number other than 0).

[–] [email protected] 3 points 8 months ago (1 children)

That sounds dangerously close to an open standard that would prevent charging $500 for key fobs.

[–] [email protected] 2 points 8 months ago

Any open standard can be tweaked slightly to make it a closed propriety one!

Though I do wish open standards were enforced for cars. Instead of each car/platform essentially being a mini monopoly that third parties need to design for specifically if they want to compete.