The basic principal behind it is that instead of making a loud noise, this system snaps a digital picture of the would-be theif/vandal before he actually starts to enter/damage the car, and stores that picture on a database for future use as evidence... There is, however, a deterrant aspect to it that is perhaps most applicable.
It works by means of small-radius motion detectors that are programmed to go off when a body lingers by any of the cars entry points (windows, doors) for more than a few seconds.
Cameras will be small, about the size and capability of the kind you find in high-end cell phones these days, and are deployed from the inside, popping out like the lock-stubs on old cars, only much faster. A second camera will come out of a roof-mounted panel and take a panaramic shot of the scene simultenously. crouching, as well as standing potential offenders will thus be capture by either the interior cameras, or the panoramic one.
Once the shot is taken, an audible voice will inform the perpetrator that their photo has just been uploaded to an online database and will be forwarded to local authorities if any damage is inflicted upon the vehicle. If the perpetrator continues, and enters the car, an interior-mounted camera will snap a shot of them driving every several seconds for as long as the camera is active.
Total price, about $2000, with installation. The target market is high-end luxury cars, but can also be used for limos, buses, RVs and boats.