Anti-theft system

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An anti-theft system is a system used to keep theft under check by the use of some alarm or lock, or taking some preventive measure at that very instances. You might have seen is sci-fi movies that such things are shown and they are used in a few place too. The most widely used technology for this thing is RFID or Radio Frequency Identification. This is a very efficient technology and is widely used in other fields too. In an anti-theft system the RFID receiver resmonse to the signals and may on its respose type automatically and instantenously send alarm to the owner and lock the system. Going by an example, lets say if such a system is there in a car and will start acting with a touch of button. If activated it will monitor signals for closing. otherwise it will not let anybody to open the car door without some higher leel identification like finger print identification.