this post was submitted on 14 Jun 2025
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Privacy

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I'm talking about this article that I remember reading last year, but I never fully comprehend it. https://archive.md/qgBWB

Especially one of the images:

What does "BFU Extractions" mean? Does it just straight up bypass any lockscreen, even Before First Unlock?

The first time I came across that article, I just assumed if you have a strong password, your fine, now I'm not so sure, I'm starting to get a bit paranoid... ๐Ÿ˜–

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[โ€“] catloaf@lemm.ee 19 points 19 hours ago (11 children)

It means they can rip the encrypted data off the phone, then take it over to a system with a bunch of GPUs and brute-force the password.

[โ€“] throwawayacc0430@sh.itjust.works 4 points 19 hours ago (5 children)

But isn't the key supposed to be in the "Secure Element" (or whatever they call it)?

[โ€“] bamboo@lemmy.blahaj.zone 12 points 17 hours ago (2 children)

It's possible that they discovered a weakness in the way the keys are generated in the TPM (or whatever it's called for Android), which brings the time to brute force down from 1,000 years to a few weeks with massive GPUs?

Similar story, as of a few years ago, OpenSSH announced deprecating support for RSA keys keys because of a vulnerability in SHA-1 hashing, where they cited research showing a determined attacker could break the key with $50k of compute power, which may seem like a lot, but is pretty feasible, necessitating the deprecation

It is now possible [1] to perform chosen-prefix attacks against the SHA-1 hash algorithm for less than USD $50K. For this reason, we will be disabling the "ssh-rsa" public key signature algorithm that depends on SHA-1 by default in a near-future release.

I don't know about the Android system, but during the initial design and fabrication, the hardware may have not been designed to withstand the compute power just a few years later, and can not be easily updated to improve the security. These are the weaknessed Cellebrite is looking for.

[โ€“] tastemyglaive@lemmy.ml 3 points 17 hours ago

Interesting. I figured there was just a backdoor in Knox or iOS it was using.

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