Working with biometrics is always a balancing act. With passwords, authentication is simple — either it matches or it doesn't. But when that "password" is part of a user's body, whether a face scan, iris match, or just a regular old fingerprint, systems have to anticipate and account for a little bit of wiggle room. After all, you don't want that face scan failing because you got a pimple, or your fingerprint rejected because you touch the sensor at a slightly different angle each time.
Read MoreFingerprint 'master keys' created with neural network could break into your phone was written by the awesome team at Android Police.
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