A technique is provided for facilitating secure operation of an integrated system. In one implementation a string fraud detector uses polarized light to detect a string. In power down, a second voltage is utilized to maintain the power requirements of the filter node within the phase lock loop while the other components of the phase lock loop are powered down. The data output is a current generated from the memory cell, and the datab output is generated by the current reference circuit. The drawer preferably includes a pair of opposed finger-gripping surfaces, such as raised ridges or projections, adapted to facilitate sliding of the drawer out of the housing. In an implementation, the currently authenticated user account of a first application of a client is transferred to another application of a client.