Abstract: The subject Invention, The Rjen Fingerprint Decoder, is designed to analyze an image of a scanned fingerprint and convert the image into a twelve digit numerical code. A numerical value is assigned to various parts of the image based on their relative locations and proximity to lines on a grid formed by vertical and horizontal lines with fixed numerical values. The calculation for each cell of the grid will produce a one digit number value for each cell resulting in a twelve digit identification code.