@misc{rfc7508,
    series =    {Request for Comments},
    number =    7508,
    howpublished =  {RFC 7508},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC7508},
    url =       {https://www.rfc-editor.org/info/rfc7508},
    author =    {Laurent Cailleux and Chris Bonatti},
    title =     {{Securing Header Fields with S/MIME}},
    pagetotal = 19,
    year =      2015,
    month =     apr,
    abstract =  {This document describes how the S/MIME protocol can be extended in order to secure message header fields defined in RFC 5322. This technology provides security services such as data integrity, non-repudiation, and confidentiality. This extension is referred to as 'Secure Headers'.},
}