An optoelectronic assembly for an electronic system includes a thermally conductive, metallized transparent substrate having a first surface and an opposite second surface. The multiple Markov chains may be combined to drive an entropy coder. The ergonomic tool lifting machine generally includes an articulating arm attached at a fixed end to a vertical lift mechanism, and at a free end to a grasping device or tool holder adapted for gripping and retaining an object of interest. In order to prevent unauthorized access to the information, unsymmetrical signature generation and authentication algorithms are used for generating and authenticating signatures for the SAM messages.