If that of the doors that are opened with digital tracks or the machines that work after analyzing the rainbow of the user sounds to film, very you are mistaken.
These systems of recognition and authentication are more near which you create; in fact you yourself you can install one in your PC! You only need one webcam and this program, Alparysoft VideoLock.
Videolock protects totally your computer doing use of a thing that nobody will be able copiarte: your face. The program records an image of the user and it stores it to compare it with the images captured of all those that feel before the PC. Only when the captured image agrees with the recorded face, the PC is unblocked.
You can change to some options of configuration establishing the margin of error, the level of security or the time interval for the monitoring of webcam. The program keeps in addition log with all the activities (attempts of access including) happened in your absence.