A method begins by a dispersed storage processing module encrypting a data segment utilizing an encryption key to produce an encrypted data segment and performing a deterministic function on the encrypted data to produce a transformed representation of the encrypted data. The specimen is disposed between first and second movable shuttles of the actuator and load sensor, which shuttles comprise electrically insulating layers so as to electrically isolate the shuttles and specimen from the actuator and the load sensor on the substrate. The collecting plate has first openings having a first height and at least one second opening having a second height that is different from the first height. A second magnetic field is included for interacting with the first magnetic field to provide torque to the resonant oscillating device for scanning the first and second reflected scan beams across a surface to provide first and second scan lines on the surface substantially simultaneously as the resonant oscillating device oscillates under the influence of the first and second magnetic fields.