%% You should probably cite draft-ietf-kitten-krb-spake-preauth instead of this I-D.
@techreport{mccallum-kitten-krb-spake-preauth-00,
    number =    {draft-mccallum-kitten-krb-spake-preauth-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-mccallum-kitten-krb-spake-preauth/00/},
    author =    {Nathaniel McCallum},
    title =     {{SPAKE Pre-Authentication}},
    pagetotal = 11,
    year =      2015,
    month =     apr,
    day =       25,
    abstract =  {This document defines a new password authenticated key exchange based pre-authentication mechanism for performing Kerberos authentication. This mechanism has three goals. First, it makes Kerberos pre- authentication more resilient against time synchronization errors by removing the need to transfer an encrypted timestamp. Second, it increases the security of the Kerberos pre-authentication exchange by making offline brute-force attacks impossible. Third, it enables the use of secure second factor authentication without FAST by utilizing the existing trust relationship established by the shared first factor.},
}