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Story : http://www.bbc.co.uk/news/technology-17490629
Technology to allow smartphones to scan their users' fingerprints through their screens as an identity check has been patented by Sony.
It describes a range of ways to build "light-transmissive displays" to allow sensors to look out of the screens.
It says an unidentified material would obscure the sensors so users would only see graphics telling them where to place their fingers.
Sony has not given any indication of when it might introduce the feature.
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Fingerprints are not very safe as identifiers. I have a better idea, use the IR capability of the camera to do facial recognition and combine with an iris scan.
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