@misc{rfc2633,
    series =    {Request for Comments},
    number =    2633,
    howpublished =  {RFC 2633},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC2633},
    url =       {https://www.rfc-editor.org/info/rfc2633},
    author =    {Blake C. Ramsdell},
    title =     {{S/MIME Version 3 Message Specification}},
    pagetotal = 32,
    year =      1999,
    month =     jun,
    abstract =  {This document describes a protocol for adding cryptographic signature and encryption services to MIME data. {[}STANDARDS-TRACK{]}},
}