%% You should probably cite rfc6187 instead of this I-D.
@techreport{igoe-secsh-x509v3-07,
    number =    {draft-igoe-secsh-x509v3-07},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-igoe-secsh-x509v3/07/},
    author =    {Kevin Igoe and Douglas Stebila},
    title =     {{X.509v3 Certificates for Secure Shell Authentication}},
    pagetotal = 16,
    year =      2011,
    month =     jan,
    day =       3,
    abstract =  {X.509 public key certificates use a signature by a trusted certification authority to bind a given public key to a given digital identity. This document specifies how to use X.509 version 3 public key certificates in public key algorithms in the Secure Shell protocol. {[}STANDARDS-TRACK{]}},
}