Not quite clear on the concept...

[Valdis.Kletnieks () vt edu]

So this Stockholm hotel wants to replace room keys with special cell phones that
have an embedded proximity RFID.

http://www.msnbc.msn.com/id/39976610/ns/technology_and_science-wireless

"But once people have the technology in their own phones, he said, it will save
them time at check-in and improve security because the access credentials in a
lost phone can be revoked remotely."

How could this possibly go wrong? :)

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