Disclosed is a vehicle security system for alerting on identifying an intrusion by an intruder. The vehicle security system includes at least one camera, a memory unit, a processing unit, a distributed set of databases, a server, an output device and a bi-directional communication unit. The camera is attached to the vehicle and is configured to capture images. The memory unit stores images captured by the camera. The processing unit is operably connected to the camera to process the images. The distributed set of databases for storing images and details of people. The server is operably connected to the processing unit, the distributed set of databases and stores authorized person images and a plurality of modules. The output device is operably connected to the processing unit to produce output signals on detecting the intruder. The plurality of modules includes an intruder module generates intruder signal by activating the output device to generate output signals and a personalized warning module activates the output device to generate personalized warning to warn off the intruder to stay away from the vehicle.