1. An apparatus, comprising: an interconnect; a digital random number generator (DRNG) circuit to condition entropy data provided by an entropy source, to generate and output a plurality of deterministic random bit (DRB) strings, and to generate and output a plurality of nondeterministic random bit (NRB) strings, wherein the plurality of DRB and NRB strings are distinct strings; an execution unit circuit coupled to the DRNG circuit, in response to a first instruction to read a seed value, to retrieve one of the NRB strings from the DRNG and to store the NRB string in a destination register specified by the first instruction, and in response to a second instruction to read a random number, to retrieve one of the DRB strings from the DRNG circuit and to store the DRB in a destination register specified by the second instruction; and a flag register to store a flag set by the execution unit to indicate whether the NRB string stored in the destination register is valid.