%% You should probably cite rfc2857 instead of this I-D.
@techreport{ietf-ipsec-auth-hmac-ripemd-160-96-03,
    number =    {draft-ietf-ipsec-auth-hmac-ripemd-160-96-03},
    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-ipsec-auth-hmac-ripemd-160-96/03/},
    author =    {Angelos D. Keromytis and Niels Provos},
    title =     {{The Use of HMAC-RIPEMD-160-96 within ESP and AH}},
    pagetotal = 7,
    year =      1999,
    month =     feb,
    day =       22,
    abstract =  {This memo describes the use of the HMAC algorithm in conjunction with the RIPEMD-160 algorithm as an authentication mechanism within the revised IPSEC Encapsulating Security Payload (ESP) and the revised IPSEC Authentication Header (AH). {[}STANDARDS-TRACK{]}},
}