Smart key or often called smart lock is usually made in the form of additional component that's injected into the door. Furthermore, the door can communicate with mobile device - this is the most common idea given.
A startup called Candy House that's born at Stanford
University apparently doesn't want to waste the existence of conventional door locks;
they want to offer new solution for the smart lock.
Named Sesame, this device is a smart lock that doesn't need
to be injected into the door, but is installed on various forms of door locks
that are often used around the world. In theory, Sesame is compatible with a
wide range of door locks (with form that's supported by the device), except if
the key is very special or unusual.
Once installed, Sesame is ready to be paired with a
smartphone via Bluetooth 4.0. Or you can also take advantage of additional
component such as Wi-Fi adapter that's embedded into an electrical outlet,
connect Sesame to the internet so you can control it when beyond the reach of
Bluetooth.
Open the locked door with Sesame can be done via a companion
app on Android or iOS. Indeed there are various ways to open Sesame. You can
knock a smartphone in your pocket, or knock the door with a special pattern to
unlock it - with condition that Sesame has detected the existence of your
connected smartphone.
You could even say "OK Google, Open Sesame" on
Android Wear smartwatch, and the door lock will open automatically - The Apple
Watch users will probably also be able to do the same thing since the Sesame is
compatible with the HomeKit platform of Apple.
Through its companion application, users can also choose
friends or family members who can access Sesame via their smartphones. About
security, Sesame is equipped with military-grade encryption, which means that
in theory it is very difficult to break into.
Sesame battery is believed can survive up to 500 days. If
the battery runs out, or your smartphone doesn't work, well, you can still open
the door manually using a standard key.