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Shopping app Temu is “dangerous malware,” spying on your texts, lawsuit claims (arstechnica.com)

submitted 4 months ago by neme@lemm.ee to c/technology@lemmy.world

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[–] Professorozone@lemmy.world 0 points 4 months ago (1 children)

Wouldn't the phone have to have your fingerprint stored in order to compare it to the one scanned?

[–] dev_null@lemmy.ml 6 points 4 months ago* (last edited 4 months ago) (1 children)

Yes, the phone does, but that data is protected in the hardware and never sent to the software, the hardware basically just sends ok / not ok. It's not impossible to hack in theory, nothing is, but it would be a very major security exploit in itself that would deserve a bunch of articles on it's own. And would likely be device specific vulnerability, not something an app just does wherever installed.

[–] Lojcs@lemm.ee 1 points 4 months ago (1 children)

Pretty sure this is not true. That's how apple's fingerprint scanners work. On android the fingerprint data is stored either in the tpm or a part of the storage encrypted by it.

[–] dev_null@lemmy.ml 1 points 4 months ago (1 children)

Yeah, so the app never sees it. What are you disagreeing with?

[–] Lojcs@lemm.ee 1 points 4 months ago (1 children)

I just corrected that, can't I without disagreeing?

[–] dev_null@lemmy.ml 1 points 4 months ago (1 children)

I mean that I don't know what part of my comment is "not true". I welcome corrections, I just don't see what is being corrected here.

[–] Lojcs@lemm.ee 1 points 4 months ago* (last edited 4 months ago) (1 children)

It doesn't send a yes/no signal it sends the fingerprint to be compared to the stored one

[–] dev_null@lemmy.ml 2 points 4 months ago* (last edited 4 months ago) (1 children)

https://developer.android.com/identity/sign-in/biometric-auth#display-login-prompt

The app gets either the onAuthenticationSucceeded or onAuthenticationFailed callback. It doesn't get the fingerprint.

Edit: I think we are misunderstanding each other, I'm saying that apps never see the fingerprint. The OS does, depending on the device.

[–] Lojcs@lemm.ee 1 points 4 months ago

I think we are misunderstanding each other

Exactly