@misc{rfc8221,
    series =    {Request for Comments},
    number =    8221,
    howpublished =  {RFC 8221},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC8221},
    url =       {https://www.rfc-editor.org/info/rfc8221},
    author =    {Paul Wouters and Daniel Migault and John Preuß Mattsson and Yoav Nir and Tero Kivinen},
    title =     {{Cryptographic Algorithm Implementation Requirements and Usage Guidance for Encapsulating Security Payload (ESP) and Authentication Header (AH)}},
    pagetotal = 15,
    year =      2017,
    month =     oct,
    abstract =  {This document replaces RFC 7321, "Cryptographic Algorithm Implementation Requirements and Usage Guidance for Encapsulating Security Payload (ESP) and Authentication Header (AH)". The goal of this document is to enable ESP and AH to benefit from cryptography that is up to date while making IPsec interoperable.},
}