%% You should probably cite rfc7253 instead of this I-D.
@techreport{irtf-cfrg-ocb-01,
    number =    {draft-irtf-cfrg-ocb-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-irtf-cfrg-ocb/01/},
    author =    {Ted Krovetz and Phillip Rogaway},
    title =     {{The OCB Authenticated-Encryption Algorithm}},
    pagetotal = 17,
    year =      2013,
    month =     apr,
    day =       4,
    abstract =  {This document specifies OCB, a shared-key blockcipher-based encryption scheme that provides privacy and authenticity for plaintexts and authenticity for associated data. This document is a product of the Crypto Forum Research Group (CFRG).},
}