http://www.macdrifter.com/2012/09/nfc-is-a-crutch.html
This article has one interesting insight on the use and replacement for NFC. I have always been a little distrustful of anything like an automated payment system that involves you nonchallantly waving your computing device near something.
Talk about out of sight, out of mind.
I really like the proposed solution much better. Use the device and the face for two factor authentication. Display the amount and some one-time handshaking encryption on the screen. Record the transaction. How simple is that.
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