%% You should probably cite rfc6614 instead of this I-D.
@techreport{ietf-radext-radsec-12,
    number =    {draft-ietf-radext-radsec-12},
    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-radext-radsec/12/},
    author =    {Klaas Wierenga and Mike McCauley and Stefan Winter and Stig Venaas},
    title =     {{Transport Layer Security (TLS) Encryption for RADIUS}},
    pagetotal = 22,
    year =      2012,
    month =     feb,
    day =       13,
    abstract =  {This document specifies a transport profile for RADIUS using Transport Layer Security (TLS) over TCP as the transport protocol. This enables dynamic trust relationships between RADIUS servers. {[}STANDARDS-TRACK{]}},
}