%% You should probably cite draft-jones-jose-json-private-and-symmetric-key instead of this I-D.
@techreport{jones-jose-json-private-key-00,
    number =    {draft-jones-jose-json-private-key-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-jones-jose-json-private-key/00/},
    author =    {Michael B. Jones},
    title =     {{JSON Private Key}},
    pagetotal = 6,
    year =      2012,
    month =     aug,
    day =       15,
    abstract =  {The JSON Private Key specification extends the JSON Web Key (JWK) and JSON Web Algorithms (JWA) specifications to define a JavaScript Object Notation (JSON) representation of private keys.},
}