This is similar to the feeling I got a few days ago when I finally got to use the shopping cart wheel unlocker that's been in the back of my mind since watching the Defcon talk about it. Instead of the misconfigured and disabled cart being a giant roadblock in the store I was able to take it and use it normally. Feels good.

https://www.begaydocrime.com/carts

WARNING: DO NOT PLAY SOUNDS ON THIS PAGE THROUGH HEADPHONES

[–] robotica@lemmy.world 6 points 10 months ago (3 children)

Website is completely borked on my phone on Firefox

[–] MoonMelon@lemmy.ml 4 points 10 months ago (2 children)

That's strange, trying a few permutations here and I can't get it to break. But at any rate, here's the content:

[embedded players for sound files]

About

Play the below sounds through your phone speaker and hold it next to a Gatekeeper Systems wheels to lock/unlock. Check me out on twitter @stoppingcart

How It Works

Most electronic shopping cart wheels listen for a 7.8 kHz signal from an underground wire to know when to lock and unlock. A management remote can send a different signal at 7.8 kHz to the wheel to unlock it. Since 7.8 kHz is in the audio range, you can use the parasitic EMF from your phone's speaker to "transmit" a similar code by playing a crafted audio file. Link to my original DEFCON 29 Talk

Button to Download Audio Files

[–] robotica@lemmy.world 2 points 10 months ago

Thanks a lot! Funny thing is that the website works fine now, something must've been bugged

[–] PipedLinkBot@feddit.rocks 1 points 10 months ago

Here is an alternative Piped link(s):

Link to my original DEFCON 29 Talk

Piped is a privacy-respecting open-source alternative frontend to YouTube.

I'm open-source; check me out at GitHub.