A Smart lock is an electromechanical lock which is designed to perform locking and unlocking
operations on a door when it receives such instructions from an authorized device using a wireless
protocol and a cryptographic key to execute the authorization process.
It also monitors access and sends alerts for the different events it monitors and some other critical
events related to the status of the device. Smart locks can be considered part of a smart home.
Most smart locks are installed on mechanical locks (simple types of locks, including deadbolts) and
they physically upgrade the ordinary lock. Recently, smart locking controllers have also appeared at
Smart locks, like the traditional locks, need two main parts to work the lock and the key.
In the case of these electronic locks, the key is not a physical key but a smartphone or a special key
fob configured explicitly for this purpose which wirelessly performs the authentication needed to
automatically unlock the door.
Smart locks allow users to grant access to a third party by means of a virtual key.
This key can be sent to the recipient smartphone over standard messaging protocols such as e-mail
Once this key is received the recipient will be able to unlock the smart lock during the time previously
specified by the sender.
Smart locks are able to grant or deny access remotely via a mobile app.
Certain smart locks include a built-in Wi-Fi connection that allows for monitoring features such as
access notifications or cameras to show the person requesting access. Some smart locks work with a
smart doorbell to allow the user to see who and when someone is at a door.
Smart locks may use Bluetooth Low Energy and SSL to communicate, encrypting communications
using 128/256-bit AES.