this post was submitted on 21 Feb 2026
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[–] CADmonkey@lemmy.world 16 points 1 day ago (1 children)

A city near me has installed a device that tracks vehicles based on their tpms (Tire Pressure Monitoring System) sensors.

All cars after 2008 in the US have TPMS. Inside the tire, integrated with the vale stem, are little pressure sensors with a radio that broadcasts on the 315Mhz band. Each one uses a slightly different frequency so that your vehicle can tell which of the four tires is low.

So each vehicle in the US made after 2008 has four unique radio signals being broadcast from it, and now there are police departments with equipment that can track those signals, and can assign each car a signature based on the frequencies the sensors are broadcasting on.

[–] cyberpunk007@lemmy.ca 7 points 1 day ago (2 children)

That's alarming, but how much can these really vary? I'd be surprised if a lot of vehicles weren't the same.

[–] CADmonkey@lemmy.world 1 points 18 hours ago

They vary by enough, and have unique identifiers. And there are four of them per car, which makes it easier to build a profile for each car. This car has these four identifiers, this other car has these four, etc. Couple that with info from license plate cameras and you can track a car without seeing it's plate.

[–] iglou@programming.dev 9 points 1 day ago* (last edited 1 day ago) (1 children)

Well, from my knowledge, the person you replied to is inaccurate. All tires will transmit at the same frequency. But every X seconds, when each tire transmits its data, it transmits an ID unique to its transmitter with it.

[–] dual_sport_dork@lemmy.world 8 points 1 day ago (2 children)

Every X seconds is pretty generous. My Subaru only seems to poll the sensors every few minutes, and only when the wheel speed is above 35 MPH or so, at least via what I've observed with my diagnostic tool. The sensors are battery powered and I suspect the low refresh rate is a deliberate gambit to conserve battery life.

You are correct on the ID point, though. They can contain up to 16 hexidecimal digits as far as I've seen, and while there doesn't seem to be any mechanism for truly enforcing uniqueness the chances of an ID collision are so low that you may as well consider it impossible. Some aftermarket sensors can be wirelessly reprogrammed with an arbitrary ID, though, which may be of marginal utility for the truly paranoid. (My diagnostic tool can do this, too. The intended use case is cloning the ID from an OEM sensor for a car whose TPMS relearn procedure is more trouble than it's worth.)

Regardless of your vehicle's polling frequency, most sensors can be woken up any time by a specific radio pulse, which my diagnostic tool can also do, and the range is surprisingly long. Just my car's own BMS where the receiver is (above the rear left wheel well) can pick up the sensors in my snow tire rims even when said rims are sitting in their storage rack inside my garage, about three car lengths away.

[–] iglou@programming.dev 3 points 1 day ago* (last edited 1 day ago)

If my memory serves well, it is configurable. I say X seconds because it can be 5, 10, 30, but of course also 60, 120... This is my programmer brain talking :)

Thanks for the comment though. Much more complete than mine.

[–] oyenyaaow@lemmy.zip 2 points 1 day ago

can't believe i'm quoting a transformers fanfic but here we are...

“Hang on,” Wheeljack said, “I’d worry about passive systems, not active. This mech wasn’t exactly enthusiastic about where he was going. I’d bet on some kind of system he wouldn’t be able to control at all—better yet, something that doesn’t rely on power or signal at all. Something he couldn’t rip out, or block by hiding—”

Hook and Scrapper had come over. “Exterior composition,” Scrapper said instantly. “I’ve thought of doing something of the sort for transport containers—stripe the cladding with varying amounts of a neutrino-scan-visible material for tracking, even underground. Megatron, if that’s the method they’ve used, we don’t have enough appropriate materials to block it. They’ll be able to locate him with satellite scanners, and they’re certainly sweeping for us already. We’ve got to dispose of him at once. Ideally, by melting him down.”

“Hey!” Ratchet stood up. “How about we don’t jump to slagging one of my patients!”

Hook stared at him as if he was insane. “What melodramatic nonsense. You’ve never even spoken to him!”

“He’s on my table, he’s my patient!” Ratchet said.

“Enough,” Megatron said. “Offer me a rational alternative, or shut up.”

Great, that wasn’t pressure or anything. “Fine, how about this: destroying him is stupid,” Ratchet said. “We still don’t know basically anything about this planet, we’ve nearly been taken down twice already, and now they know for sure we’ll be trying for the Excelsior, which means they’re going to be waiting for us there with everything they’ve got. We need intel, and he’s probably got it.” Megatron’s face didn’t change, but he kept listening, at least. “And we don’t need to cover him head to toe with palladium sheathing. We just need to make sure he doesn’t match the pattern they’re scanning for.”

“Well?” Megatron said to Scrapper.

“We’d have to isolate the material they used… but I suppose Mixmaster could analyze a panel of his frame,” Scrapper said grudgingly. “We could disguise him…”

“Except then they will find a pattern here that doesn’t match anything in their database,” Hook said.

“Yeah, but they can’t have a negative-match process,” Wheeljack put in. “They’re not energy-bound, right? They’re materials-bound. That’s why they—recycle instead of smelt down. Any one of their mechs is probably carrying a dozen old parts, and you’d get a negative match any place two patterns overlap. They probably just make sure each new mech gets at least some parts in a unique pattern, and that’s what they’ll be looking for.”

but if there's also cameras everywhere then every time a negative match comes out then it just triggers the cameras to pick out those cars. best bet would be collectively agreeing to use one set of specific id for everyone, not a randomized id and thus unique id's

[–] maplesaga@lemmy.world 18 points 1 day ago (1 children)

Just like everyone is quitting facebook, ChatGPT, and all the other things people are boycotting that seem to never have anything happen to them.

[–] null@lemmy.org 7 points 1 day ago (1 children)

Already deleted my FB. Instagram is getting close with how many "suggested" posts they cram into my feed that should be just my friends.

[–] matlag@sh.itjust.works 10 points 1 day ago (1 children)

Not sure the lemmy crowd is representative of the general public trends.

[–] null@lemmy.org 3 points 1 day ago

Most likely not.

[–] Newsteinleo@infosec.pub 18 points 1 day ago (2 children)

How would I go about finding a Flock camera?

[–] Tollana1234567@lemmy.today 2 points 1 day ago

i suspected there was some near our area, considered the speed cameras are suspiciously placed on an area that doesnt have much traffic to begin with.

[–] CADmonkey@lemmy.world 11 points 1 day ago (1 children)
[–] Slovene@feddit.nl 5 points 1 day ago (2 children)

What are the chances that it's NOT a porn site?

[–] chiliedogg@lemmy.world 5 points 1 day ago* (last edited 1 day ago)

I suppose we could make Flock feeds into porn sites...

[–] CADmonkey@lemmy.world 5 points 1 day ago (1 children)

Be brave, my random Internet friend. Click the link. It's either the info you want, or it's titties.

[–] Newsteinleo@infosec.pub 4 points 1 day ago

I was sorely disappointed to learn that the site did contain titties

[–] njordomir@lemmy.world 10 points 1 day ago

I vandalized my own Ring cameras. It didn't feel right to resell them just so they can spy on me from someone else's front porch.

[–] cohete@lemmy.world 15 points 1 day ago (1 children)

You most definatly shouldent make a cell phone app that you can put in front of the camera that just cycles through random plates and includes copies of conststution. I wonder if you can do 10 per second. 36000 per hour all day long.

[–] Manifish_Destiny@lemmy.world 6 points 1 day ago

Hell yeah brother

[–] mrpollo@lemmy.zip 8 points 1 day ago (2 children)

Good. We need to teach these pigs a lesson

[–] korazail@lemmy.myserv.one 9 points 1 day ago (1 children)

The fun part is that these cameras are not owned, operated or property of your local jurisdiction. They are hardware/software as a service. IANAL, but I think Flock would have to sue you.

I have not personally de-flocked anything, but my local area doesn't have any that aren't tied to a business parking lot.

If some show up, I can't imagine a 5 minute walk with a hat, face mask and a can of spraypaint wouldn't be sufficient to disable one without risk. Might need a stool.

[–] CADmonkey@lemmy.world 1 points 18 hours ago

The flock cameras local to me only face one direction, which makes it a little easier. Still better mask up.

Every time I see one I get curious about the solar panel. Wonder how much non-nazi stuff it could run?

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[–] Earthman_Jim@lemmy.zip 8 points 1 day ago

Heartwarming.

[–] trackball_fetish@lemmy.wtf 67 points 2 days ago (12 children)

Fun fact: lots of them have exposed cables that should not be cut with a long arm pruning pole found in your grandmother's shed.

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[–] Mwa@thelemmy.club 5 points 1 day ago
[–] TheObviousSolution@lemmy.ca 55 points 2 days ago (10 children)

Fuck centralized surveillance.

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[–] archchan@lemmy.ml 234 points 2 days ago* (last edited 2 days ago) (32 children)

Good, fuck this panopticon dystopia shit.

Also, some guy sliced the entire pole and left a message:

hahaha get wrecked ya surveilling fucks

[–] MisterFrog@lemmy.world 1 points 1 day ago

Props to the camera person for showing the message.

Every small resistance counts ✊

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[–] XeroxCool@lemmy.world 36 points 2 days ago* (last edited 2 days ago)

I just learned HGTV has a Jan 7 2026 show called "Neighborhood Watch". It's like America's Funniest Home Videos, but it's all doorbell/security cameras. User-submitted, I think. I absolutely refuse to believe this was a casual idea from HGTV as they struggle to maintain viewership. There's no way this isn't funded by one of these companies, meant to continue making everyone comfortable with constant surveillance and increasing the desire to have constant recording devices to catch these one-off comedic moments.

Tagline: "Everywhere you go, cameras are recording. Your neighbors are watching."

[–] Zier@fedia.io 131 points 2 days ago (4 children)

This is exactly what this company deserves, to be smashed out of business and history.

Reminder: If you destroy a camera, be aware that other cameras in the area may be recording you as well. Protect your identity.

[–] muusemuuse@sh.itjust.works 5 points 1 day ago

That’s why you do this as part of a massive crowd of people that don’t know eachother. Overwhelm them.

Bring laser pointers to protests

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[–] LogicalDrivel@sopuli.xyz 140 points 2 days ago (18 children)

my neighbor hood has one right at the entrance. I make a point of flipping it off every time i pass it. Also, If you were curious how many of these violations of privacy are around you. Here you go- https://deflock.org/map

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[–] pir8t0x@lemmy.ml 5 points 1 day ago

Oh, Great news!

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