1. A method for authenticating a digitized signature comprising: recording at least the position coordinates of points of a first signature and coding the recorded points in coordinates relative to a coordinate of a previous point of the first signature and the time of the points thereof; recording at least the position coordinates of points of a second signature and coding the recorded points in coordinates relative to a coordinate of a previous point of the second signature and the time of the points thereof; generating for each of the first and second signatures from the recorded coded point coordinates and times thereof at least two corresponding characteristics of each signature including: (a) a size and shape of the signature, (b) a number of strokes of the signature, (c) a length of strokes of the signature, (d) a number of closed loops of the signature, (e) an order or sequence of strokes of the signature, (f) a tangent of one or more strokes of the signature, (g) a tangent of one or more segments of the strokes of the signature, (h) a time between the starting point and an ending point of the signature, (i) a time of a stroke or of a segment of a stroke of the signature, (j) a speed of a stroke or of a segment of a stroke of the signature, (k) a derivative of any of characteristics (f) through (j); comparing the at least two characteristics generated for the first signature to the corresponding at least two characteristics generated for the second signature; and identifying or authenticating the second signature if the comparison of the at least two characteristics thereof to the corresponding at least two characteristics of the first signature correlate to at least a predetermined value.