A device, a system, and methods of securing an authentication device are disclosed. Statistical estimation techniques are used to achieve resolution enhancement, while properly accounting for the Poisson noise distribution and other artifacts introduced by a modulator or chopper or other system components. The plurality of slave CPU cards are controlled by the master CPU card in a software level and a hardware level, each of the plurality of slave CPU cards receives and processes one of the plurality of sub-processes then sends back to the master CPU card. The business method facilitates offering discounts in gasoline, which are automatically reduced or changed to comply with local below cost sales rules. A web services signature is generated for the analytical model based on the populated set of tables.