%% You should probably cite rfc1321 instead of this I-D.
@techreport{rsadsi-rivest-md5-02,
    number =    {draft-rsadsi-rivest-md5-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-rsadsi-rivest-md5/02/},
    author =    {Ronald L. Rivest},
    title =     {{The MD5 Message-Digest Algorithm}},
    pagetotal = 21,
    year =      ** No value found for 'doc.pub_date.year' **,
    month =     ,
    day =       ** No value found for 'doc.pub_date.day' **,
    abstract =  {This document describes the MD5 message-digest algorithm. The algorithm takes as input a message of arbitrary length and produces as output a 128-bit "fingerprint" or "message digest" of the input. This memo provides information for the Internet community. It does not specify an Internet standard.},
}