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FBI cracks phone belonging to Trump rally shooting suspect
(www.theguardian.com)
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this post was submitted on 15 Jul 2024
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Something sus about how quickly they can unlock phones when it's attempted murderer killed dead and murder victims killed dead.
Most phones are locked with a four digit numerical PIN. The current technique is taking an image of the flash memory, and reflashing the memory after every few attempts.
It still takes a bit longer than straight brute force without a temporal lockout, but it’s still pretty trivial.
15 years ago, yes, nowadays especially on iPhone this does not work at all
It does when you have physical access to the RAM and storage, and a disassembly lab expressly configured for this purpose.
This is the backbone for a number of forensic services offered to law enforcement, and an entire cottage industry. I know with certainty it was still feasible as of the iPhone 12, which is well inside of 15 years. I don’t believe the architecture in the 13 or 14 has changed significantly to make this impossible.
With slightly earlier phones, tethered jailbreaks are often good enough, though law enforcement would more likely outsource to a firm leveraging Cellebrite or Axiom as the first step.
How does this work with for example the Titan-M in pixels with graphene?
I believe newer iphones have something similar (?)
No, it doesn’t. This is what the Secure Enclave is for.
You’re not storing these counters in system memory. You’re sending attempts to an isolated chip.
Yes, it does, if they have full access to the disassembled hardware and assuming research time & resources they could do practically anything. Such as emulating the Secure Enclave chip with a “fraudulent” version, changing all firmware running on any semiconductors in the phone, isolating storage, I don’t know the details, but let your imagination loose.
Physical, uninterrupted access is unlikely, yet bad news for anyone’s threat model.
not only physical access, but the authority to get any information necessary from the manufacturers of every component in the device. there is no question to them how any component operates, from silicon to software.