Sometimes you get an intuition that your computer has been used by someone or there has been an attempt to login into your system in your absence. You also suspect that your colleague might have tried a few times to get through your password and failed.
If somebody now tries to scroll the mouse, he will have to enter the original PIN. If the intruder fails to do it in few seconds then the software will send you an email alert and if possible a photo if your webcam is on.
The software may not be able to prevent the intrusion but atleast helps to notify you in time. Also since this is a web application it does not require any kind of installation.
Internally, the site uses jQuery (mouseLeaveEvent) to detect mouse movements while the webcam photographs are captured using the getUserMedia() API currently supported in Chrome and Firefox. The only bug in this application is that alerts may be sent even when any of the keys are pressed. This makes it difficult to lock the computer after the monitor is set.