// entropy from our pool. Note, "XTR may be deterministic or keyed
// via an optional “salt value” (i.e., a non-secret random
// value)..." - http://eprint.iacr.org/2010/264.pdf. However, we
// use a strongly random value since we can.
// entropy from our pool. Note, "XTR may be deterministic or keyed
// via an optional “salt value” (i.e., a non-secret random
// value)..." - http://eprint.iacr.org/2010/264.pdf. However, we
// use a strongly random value since we can.