Access control

In the old days you had a lock and key. The primary issue with keys is that they get lost. 

IoT systems operate on multiple layers to secure access points. The security of a door or window relates to more than just the materials used or a physical locking mechanism. IoT allows remote access and control plus app based functionalities.

You might want to grant staff remote access to a large facility. You can provide that access. How do you secure your premises? You update access in real-time in multiple locations.