Enabling discretionary data access control in a cloud computing environment can begin with the obtainment of a data request and response message by an access manager service. The CD is controlled, at least in part, by a processor IC according to a software program operating therein and provides feedback to a user via a visual display, an audio alarm, and a vibrational alarm, and allows input from the user via a touch sensitive keypad. The method further includes receiving the first data stream at a first sample rate converter at a first consumption rate and generating a first output data stream at an output sample rate. Solution-mined, salt-enclosed cavities, located at less than about 3,000 feet of depth are preferred. In other models, the handle is formed of a single part.