Expand description
Additional hashes + HMAC + random/uuid.
(sha1 STR) → hex digest (sha512 STR) → hex digest (hmac-sha256 KEY MESSAGE) → hex digest (uuid-v4) → RFC 4122 v4 UUID string (random-hex N) → N bytes of crypto-random hex (2*N chars) (random-int LO HI) → uniform random in [LO, HI)