@techreport{liao-smimeheaderprotect-05,
    number =    {draft-liao-smimeheaderprotect-05},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-liao-smimeheaderprotect/05/},
    author =    {Lijun Liao and Joerg Schwenk},
    title =     {{Header Protection for S/MIME}},
    pagetotal = 13,
    year =      2009,
    month =     jun,
    day =       30,
    abstract =  {In the current S/MIME Version 3.1 specification, the header protection is achieved by encoding the whole message as a message/rfc822 MIME media. Since this approach poses some practical problems, we propose to use signed attributes to implement a fully backward compatible S/MIME header protection scheme.},
}