This package provides bindings to Colin Percival's
(<http://www.tarsnap.com/scrypt.html>). Scrypt is a key derivation function
designed to be far more secure against hardware brute-force attacks than
alternative functions such as PBKDF2 or bcrypt.
Details of the scrypt key derivation function are given in a paper by Colin
Percival, Stronger Key Derivation via Sequential Memory-Hard Functions: