%% You should probably cite draft-ietf-privacypass-protocol instead of this I-D.
@techreport{davidson-pp-protocol-01,
    number =    {draft-davidson-pp-protocol-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-davidson-pp-protocol/01/},
    author =    {Alex Davidson},
    title =     {{Privacy Pass: The Protocol}},
    pagetotal = 20,
    year =      2020,
    month =     jul,
    day =       13,
    abstract =  {This document specifies the Privacy Pass protocol. This protocol provides anonymity-preserving authorization of clients to servers. In particular, client re-authorization events cannot be linked to any previous initial authorization. Privacy Pass is intended to be used as a performant protocol in the application-layer.},
}