@techreport{kazu-pgpmime-multisig-00,
    number =    {draft-kazu-pgpmime-multisig-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-kazu-pgpmime-multisig/00/},
    author =    {Kazu Yamamoto},
    title =     {{Multi-signature Extensions for PGP/MIME}},
    pagetotal = 6,
    year =      1997,
    month =     may,
    day =       19,
    abstract =  {PGP/MIME provides single signature service of PGP in the context of MIME, however, multiple signature service is desired for usability and flexibility. For this purpose, this memo defines 'Multipart/PGP-Signature' used as the 'protocol' parameter and the content type of the second part of 'Multipart/Signed'. Canonical MIME format used in PGP/MIME is reasonable but it is not enough for some kinds of MIME objects, particularly for ISO 2022 text. Thus, this memo extends the 'micalg' parameter syntax as 'pgp-\textless{}hash-symbol\textgreater{}+\textless{}canform-symbol\textgreater{}' so that \textless{}canform-symbol\textgreater{} can specify more specific canonicalization for signature calculation.},
}