These Cell Phones Open Doors
Add house keys to the list of objects your cell phone can replace. Japan's NTT Business Associates Ltd. is piloting a system called MoCaCa (Mobile Communication and Control for Comfortable Areas), a security infrastructure that uses RFID chips embedded in cell phones and wallets to activate electronic door locks. The oft-predicted capability will be initially deployed in two new apartment complexes in Tokyo.
Sources: RFID in Japan, Smart Mobs