%% You should probably cite rfc7906 instead of this I-D.
@techreport{turner-km-attributes-07,
    number =    {draft-turner-km-attributes-07},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-turner-km-attributes/07/},
    author =    {Paul Timmel and Russ Housley and Sean Turner},
    title =     {{NSA's Cryptographic Message Syntax (CMS) Key Management Attributes}},
    pagetotal = 68,
    year =      2016,
    month =     mar,
    day =       15,
    abstract =  {This document defines key management attributes used by the National Security Agency (NSA). The attributes can appear in asymmetric and/or symmetric key packages as well as the Cryptographic Message Syntax (CMS) content types that subsequently envelope the key packages. Key packages described in RFCs 5958 and 6031 are examples of where these attributes can be used.},
}