To ensure that recorded video files are not tampered with once they have been recorded, videos can be timestamped in a tamper-proof manner, a procedure termed trusted timestamping. One method for trusted timestamping video files involves immediately storing the unique hash of the file on the decentralized Blockchain of a cryptocurrency to securely prove its time of existence.
To ensure a reliable 24/7 parking surveillance when capacity is an issue, a motion detector may be used to record only when an approaching human/vehicle is detected, in order to save power and storage media.
A dash cam, dashboard camera, car DVR, or car black box is an onboard camera that continuously records the view through a vehicle’s windscreen. It may be attached to the interior windscreen or to the top of the dashboard, by suction cup or adhesive-tape mount. Dashcams may provide video evidence in the event of a road accident. During parking, some dashcams still can capture video evidence if vandalism act is detected.