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> It's unlikely that someone will be able to unlock my phone without me knowing it when using TouchID

Do you really think it's likely that someone will steal your phone and then trick you into looking at your own phone without you realizing it? At that point you might as well be tricked into putting your finger on a TouchID sensor.

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Well it's definitely possible to have me looking my phone held by someone else. And it's then too late...

Yea, it’s possible a thief would be so brazen as to return to the scene of the crime and show you your stolen phone just to unlock it (instead of just assaulting you till you unlocked it). Who are you worried about, the Mission Impssibke team?

I wonder...would it be possible to 3D print someone's likeness so as to spoof the FaceID?

You would also have to make the 3D print mimic the same infrared emission patterns as the original person’s.

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