  This paper is intended to provide the readers with a clear understanding of
the modification done to the pseudo-random number generator (PRNG) arc4random.
The arc4random PRNG was modified to implement a non-deterministic rekey
interval. A comparison was made with the unpatched version regarding
performance and the rekey interval's randomization. All measurements were done
when the rekey was performed. A slight increase in performance was observed,
and the rekey interval was randomized as expected.
