a smart anti theft system that can be used for one door way room or small office this system uses a microcontroller and an ultrasonic sensor to sense if there is some one or object outthere if there is it sends a signal to the camera which captures what it is in front of it and if there is a person it extracts its face converts to and 128 column vector and compares it with the database (for example the owners relative) if it is not known it will send a message to the owner and captured photo of the robber through email to the owner