%% You should probably cite rfc2404 instead of this I-D.
@techreport{ietf-ipsec-auth-hmac-sha196-02,
    number =    {draft-ietf-ipsec-auth-hmac-sha196-02},
    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-sha196/02/},
    author =    {K. Robert Glenn and Cheryl R. Madson},
    title =     {{The Use of HMAC-SHA-1-96 within ESP and AH}},
    pagetotal = 7,
    year =      1998,
    month =     feb,
    day =       13,
    abstract =  {This memo describes the use of the HMAC algorithm in conjunction with the SHA-1 algorithm as an authentication mechanism within the revised IPSEC Encapsulating Security Payload and the revised IPSEC Authentication Header. {[}STANDARDS-TRACK{]}},
}