Disclosed is a printed wiring board having signal layers each interposed between a power supply layer and a ground layer, wherein the signal layer includes at least one of a wiring region for a ground potential and a wiring region for a power supply potential. Different formulations for authentication blocks are used according to whether a block of data occupies a cleartext position or ciphertext position. The lookup table stores sufficient information for the network interface, or another system component, to access the SA data. A distal end of the cladding comprises a tapered section that engages the tapered section of the bore. Current summing lines along each row and column of the array are used as inputs to x and y position sensitive circuitry located on the edge of the pixel array.