The present invention relates to methods of formulating analyte data databases, the databases themselves, and methods of manipulating the same. The device may include a seed generator for performing a one-way algorithm using a secret key, a device address, and a changing reference value for generating a seed. Moisture is evacuated through channels, raised areas, perforations in one of the lamellae thereby improving the stretching effect and uniformity of the stretched leather across its entire surface without wrinkling. A first switch is complementarily positioned within the second area and corresponds to the first portion of the sheath for actuation of the first switch upon application of pressure on an exterior surface of the sheath substantially anywhere along the first portion. 5 an inversion portion multiplies by \u22121 an error from a neighboring pixel and an error to a neighboring pixel. In the event of failure of the pressure scale, the throttle valve assumes its blocking position.