In recent years face recognition has received substantial attention from both research communities and the market, but still remained very challenging in real applications. A lot of face recognition algorithms, along with their medications, have been developed during the past decades. In this paper we are going to present reviews about real time simulation of various security systems. These security systems are based on face detection, face tracking and face recognition. In this paper we will also present applications of real-time systems and some advancement that can be done in future to make security systems much faster. There are various algorithms available for face detection, tracking and recognition of human expressions This paper is the review of research work “spontaneous and different facial expressions and poses of individual person faces are detected and stored in the database of organization by giving appropriate and unique card id number and password. If a person comes for work then his or her face is detected and this detected face image is compared with images in the database of that particular organization and unique card id number and password. If the face image and id number are recognized then person is allowed to enter. If it is not recognized then person is not allowed to enter. An alert message is generated to administrator’s cell phone and mail to the administrator’s mail id. In the reverse we are changing the password by using random string generation and shut down the system”.