Digitally Captured Signature solution errors revealed by calibration and testing: Two examples

Digitally Captured Signature (DCS) solutions consist of a hardware and a software component. Even though technical characteristics are almost always provided by the manufacturer, the implementation of a given solution may include errors and should be subject to examination. Furthermore, the non-intuitive relation between the exercised force (in Newtons) and the assigned values (arbitrary Pressure Levels) for the Force Channel data, as found in the standard collection of biometric data X for the X axis position, Y for the Y axis position, F for the pressure sensor values, and T for time, makes DCS solutions more difficult for companies to provide any such test or information, making the calibration of the Force Channel data a necessary step. In this paper, we present two real case deployments that proved to be problematic after thorough examination, one on the software component and the other on the hardware component. These problems were communicated to the providers of the specific DCS solutions and were corrected.