%% You should probably cite rfc7914 instead of this I-D.
@techreport{josefsson-scrypt-kdf-01,
    number =    {draft-josefsson-scrypt-kdf-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-josefsson-scrypt-kdf/01/},
    author =    {Colin Percival and Simon Josefsson},
    title =     {{The scrypt Password-Based Key Derivation Function}},
    pagetotal = 20,
    year =      2012,
    month =     sep,
    day =       24,
    abstract =  {This document specifies the password-based key derivation function scrypt. The function derives one or more secret keys from a secret string. It is based on memory-hard functions which offer added protection against attacks using custom hardware. The document also provides an ASN.1 schema.},
}