Electronic intrusion detection is much trickier than human intrusion detection.
Humans can search for the intruder by opening doors, looking into closets, etc.
Network or computer intrusion detection is much trickier. It requires the network to monitor the network intrusion, a computer to monitor computer intrusion. What we need is an artificial intelligence system linked or bound to communication protocols and file systems that detects intrusions. I have started such a project as well as other projects. Click here to go to this article.