@misc{rfc8550,
    series =    {Request for Comments},
    number =    8550,
    howpublished =  {RFC 8550},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC8550},
    url =       {https://www.rfc-editor.org/info/rfc8550},
    author =    {Jim Schaad and Blake C. Ramsdell and Sean Turner},
    title =     {{Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Certificate Handling}},
    pagetotal = 29,
    year =      2019,
    month =     apr,
    abstract =  {This document specifies conventions for X.509 certificate usage by Secure/Multipurpose Internet Mail Extensions (S/MIME) v4.0 agents. S/MIME provides a method to send and receive secure MIME messages, and certificates are an integral part of S/MIME agent processing. S/MIME agents validate certificates as described in RFC 5280 ("Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile"). S/MIME agents must meet the certificate-processing requirements in this document as well as those in RFC 5280. This document obsoletes RFC 5750.},
}