Lockitron: the world's smartest door lock

Equipped with WiFi, Bluetooth, NFC and its own Internet page, Lockitron uses an Android or iOS compatible phone instead of a key, informs the owner when someone opens it or simply knocks on the door, allows you to open and close the door, thousands of kilometers away from her and hand out digital access keys to friends or co-workers so that they can open it with their phone.

At the same time, it meets the rather stringent requirements for fault tolerance, backward compatibility and security - in the absence of the Internet, electricity, Bluetooth, NFC, batteries and a telephone, it can be opened with a regular key. Moreover, the key can even not be changed when installing the lock - it can be put literally over the old one in a couple of minutes.

How does it work? Lockitron looks like a regular mortise lock with a patch box on the inside of the door. This box can be installed separately, subject to the mechanical compatibility of the handle of the old lock and the Lockitron actuator. Regular mode of operation - via WiFi (mini-server included).
In this mode, a maximum of functions is available - remote control, notifications, access control for guests or relatives. If you cannot connect via WiFi - the electricity or the Internet in the house is turned off, or the server is unavailable - you can open the lock if the phone supports Bluetooth or NFC. And you can program it so that it opens automatically as soon as the owner's phone appears in the visible area of ​​the network. That is, you can enter the house without taking the phone out of your pocket.

If your phone is lost, you can restore access from any device connected to the Internet via the web interface. Well, finally, when the battery sits down (and this, according to manufacturers, occurs about once a year, and the lock reports this in advance) will have to use the usual key.
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All Lockitron traffic goes over https, the iron part uses the same standards as car electronic locks, and letters to security@lockitron.com can optionally be encrypted with a PGP key published on the site. So it is much easier to physically hack the door than to get wireless access to the lock or steal digital keys. Moreover, Lockitron is recommended to be installed on wooden doors - iron can shield the signal.

The lock has a simple API and even the possibility of flashing (inside - ATMega microcontroller, familiar to every arduinschik). You can order such a lock for $ 149 (delivery outside the US - separately). First deliveries are expected in March 2013.