@misc{rfc6560,
    series =    {Request for Comments},
    number =    6560,
    howpublished =  {RFC 6560},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC6560},
    url =       {https://www.rfc-editor.org/info/rfc6560},
    author =    {Gareth Richards},
    title =     {{One-Time Password (OTP) Pre-Authentication}},
    pagetotal = 43,
    year =      2012,
    month =     apr,
    abstract =  {The Kerberos protocol provides a framework authenticating a client using the exchange of pre-authentication data. This document describes the use of this framework to carry out One-Time Password (OTP) authentication. {[}STANDARDS-TRACK{]}},
}