%% You should probably cite rfc2315 instead of this I-D.
@techreport{hoffman-pkcs-crypt-msg-02,
    number =    {draft-hoffman-pkcs-crypt-msg-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-hoffman-pkcs-crypt-msg/02/},
    author =    {Burt Kaliski},
    title =     {{PKCS \#7: Cryptographic Message Syntax Version 1.5}},
    pagetotal = 32,
    year =      1997,
    month =     sep,
    day =       17,
    abstract =  {This document describes a general syntax for data that may have cryptography applied to it, such as digital signatures and digital envelopes. This memo provides information for the Internet community. It does not specify an Internet standard of any kind.},
}