%% You should probably cite rfc1994 instead of this I-D.
@techreport{ietf-pppext-chap-ds-00,
    number =    {draft-ietf-pppext-chap-ds-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-pppext-chap-ds/00/},
    author =    {William A. Simpson},
    title =     {{PPP Challenge Handshake Authentication Protocol (CHAP)}},
    pagetotal = 13,
    year =      1995,
    month =     nov,
    day =       22,
    abstract =  {This document defines a method for Authentication using PPP, which uses a random Challenge, with a cryptographically hashed Response which depends upon the Challenge and a secret key. {[}STANDARDS-TRACK{]}},
}