A driver circuit is coupled to an optical waveguide transmitter. The system of the invention comprises the manufacturer of the device and an enrollment authority. The first end of one of the rod assembly connectors is configured to connect with the second end of the second rod assembly connector. The voltage source applies an ac voltage to the second inductor set. Particles are concentrated within one or more particle focus regions of the sample flow by the effects of the SAW. Moreover, systems and methods for caching of content addressed by identifiers intended to defeat cache are further disclosed.