Vein Matching is a technique of biometric identification, which provide essential information regarding the blood supply to and from the tissues of the extremities and the vital organs of the body, and the degree and character of any obstruction. It is use in conjunction with existing forensic data in support of a conclusion. Vascular scanners do not require contact with the scanner, and since the information they read is on the inside of the body, skin conditions do not affect the accuracy of the reading. Vascular scanners also work with extreme speed, scanning in less than a second. As they scan, they capture the unique pattern veins take as they branch through the hand.