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.
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.
Wouldn’t the phone have to have your fingerprint stored in order to compare it to the one scanned?
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.
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.
Yeah, so the app never sees it. What are you disagreeing with?
I just corrected that, can’t I without disagreeing?
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.
It doesn’t send a yes/no signal it sends the fingerprint to be compared to the stored one
https://developer.android.com/identity/sign-in/biometric-auth#display-login-prompt
The app gets either the
onAuthenticationSucceededoronAuthenticationFailedcallback. 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.