Password definition and recognition in programmable devices with back-to-back transparent, touchscreens includes defining first and second contact patterns on respective first and second ones of the touchscreens as patterns of touchscreen contact inputs generated from contact of respective contact elements on the touchscreens contemporaneously, wherein the touchscreens enable a viewer to see through the touchscreens. A composite password pattern is defined by mapping location of the first pattern on the first screen relative to the location of the second pattern on the second screen. Recognizing a successful entry of the composite password pattern requires an entry of the first pattern on one of first and second, back-to-back touchscreens contemporaneously with an entry of the second pattern on another of the first and second touchscreens in an alignment that is compliant with the composite password mapping.