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Comment Re:the phone may not always be in possession phone (Score 1) 114

Hasn't it been shown that you can take a fingerprint left by someone (say, on their phone) and use it to fool a fingerprint scanner?

It has been shown that this works for old, cheap or crappy fingerprint readers. Modern, state-of-the-art scanners can check for a pulse, or use other techniques to detect tampering. Anyway, the whole point of multi-factor is that each individual factor doesn't have to be perfect. Two layers that are each 90% secure are as good as one layer that is 99% secure.

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