Not good enough. Phones can figure out its location using gyroscopes and accelerometer, then if at any point in the future, you remove it from the faraday cage, your entire movement logs are transmitted.
I don’t think their gyroscopes are good enough for that level of inertial navigation. You could just fling it around tossing it up in the air and down again, that would totally mess with its navigation.
The far greater threat is that you just have the phone taken off you. For that reason alone you should use a burner, but I don’t think you should be worried that they can track you based on gyroscope history.
Unless your device is already compromised, that information isnt being logged when the device is powered off so it’s kind of moot.
“powered off”
Unless I’m holding the battery in one hand and the phone in the other I don’t trust it being turned off either.
The reason it being turned off matters is because LE has a significantly more difficult time extracting data from that state. And again, a proper faraday bag prevents signal leak.
You guys are welcome to do what you want, I’m just explaining the best way to stay safe if you don’t want to leave your phone at home. There are plenty of legitimate reasons someone may want one as a lifeline just in case.
My concern would be that the police would confiscate my phone. Not that they would necessarily be anything on it, but I don’t want them to have my nice expensive phone. They can have this crappy cheap one instead.
when a large, trump supporter corporation, with its main business being habit and environment tracking based personalized advertising, has so deep access to your phone as it literally builfs the operating system for it, maybe it is indeed already compromised.
drosophila@lemmy.blahaj.zone 2 days ago
This is plainly false.
The error stack-up from the imprecision of a phone’s MEMS sensors would make positioning basically impossible after a couple of dozen feet, let alone after hours of walking around.
There are experimental inertial navigation systems that can do what you describe, but they use ultra sensitive magnetometers to detect tiny changes in the behavior of laser suspended ultra cold gas clouds that are only a few hundred atoms large. That is not inside your phone.
masta_chief@sh.itjust.works 2 days ago
You seem to know a lot about this. I’m just generally fascinated by this method of tracking. Would the sensors ever become accurate enough in the future? Or is there a limit to their accuracy due to physics with a small sensor?
tamman2000@lemmy.world 1 day ago
It will always be a matter of “for how long?”. Location from integrated acceleration is what we call a stiff problem. Meaning that any error is compounded as you continue to integrate (slight over simplification, but good enough for the point). There will never be a sensor that has zero error, so it’s just a question of how much integration you can do before the errors make the results unusable.