NFC Coming Soon To Yale Door Locks

 

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During CEDIA Expo 2011, Yale demonstrated what appears to be the first consumer door lock that employs near field communication - just hold your NFC-enabled smartphone near the lock and the latch responds, as long as you have the right permissions.

Link

Interesting. I am pretty sure a conventional key would also unlock the door in case the handset runs out of battery, or gets nuked / bricked.