@misc{rfc9447,
    series =    {Request for Comments},
    number =    9447,
    howpublished =  {RFC 9447},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC9447},
    url =       {https://www.rfc-editor.org/info/rfc9447},
    author =    {Jon Peterson and Mary Barnes and David Hancock and Chris Wendt},
    title =     {{Automated Certificate Management Environment (ACME) Challenges Using an Authority Token}},
    pagetotal = 11,
    year =      2023,
    month =     sep,
    abstract =  {Some proposed extensions to the Automated Certificate Management Environment (ACME) rely on proving eligibility for certificates through consulting an external authority that issues a token according to a particular policy. This document specifies a generic Authority Token Challenge for ACME that supports subtype claims for different identifiers or namespaces that can be defined separately for specific applications.},
}