%% You should probably cite rfc6218 instead of this I-D.
@techreport{zorn-radius-keywrap-18,
    number =    {draft-zorn-radius-keywrap-18},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-zorn-radius-keywrap/18/},
    author =    {Joseph A. Salowey and Tiebing Zhang and Glen Zorn and Jesse R. Walker},
    title =     {{Cisco Vendor-Specific RADIUS Attributes for the Delivery of Keying Material}},
    pagetotal = 18,
    year =      2011,
    month =     jan,
    day =       12,
    abstract =  {This document defines a set of vendor-specific RADIUS Attributes designed to allow both the secure transmission of cryptographic keying material and strong authentication of any RADIUS message. These attributes have been allocated from the Cisco vendor-specific space and have been implemented by multiple vendors. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}