%% You should probably cite rfc9578 instead of this I-D.
@techreport{ietf-privacypass-protocol-04,
    number =    {draft-ietf-privacypass-protocol-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-privacypass-protocol/04/},
    author =    {Sofia Celi and Alex Davidson and Armando Faz-Hernandez and Steven Valdez and Christopher A. Wood},
    title =     {{Privacy Pass Issuance Protocol}},
    pagetotal = 21,
    year =      ,
    month =     ,
    day =       ,
    abstract =  {This document specifies two variants of the the two-message issuance protocol for Privacy Pass tokens: one that produces tokens that are privately verifiable, and another that produces tokens that are publicly verifiable. The privately verifiable issuance protocol optionally supports public metadata during the issuance flow.},
}