%% You should probably cite rfc9493 instead of this I-D.
@techreport{ietf-secevent-subject-identifiers-00,
    number =    {draft-ietf-secevent-subject-identifiers-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-ietf-secevent-subject-identifiers/00/},
    author =    {Annabelle Backman and Marius Scurtescu},
    title =     {{Subject Identifiers for Security Event Tokens}},
    pagetotal = 9,
    year =      2018,
    month =     jul,
    day =       18,
    abstract =  {Security events communicated within Security Event Tokens may support a variety of identifiers to identify the subject and/or other principals related to the event. This specification formalizes the notion of subject identifiers as named sets of well-defined claims describing the subject, a mechanism for representing subject identifiers within a {[}JSON{]} object such as a JSON Web Token {[}JWT{]} or Security Event Token {[}SET{]}, and a registry for defining and allocating names for these claim sets.},
}