Cryptology ePrint Archive: BibTeX Citation of Report 2015/311

@misc{cryptoeprint:2015:311,
    author = {Masayuki Abe and Bernardo David and Markulf Kohlweiss and Ryo Nishimaki and Miyako Ohkubo},
    title = {Tagged One-Time Signatures: Tight Security and Optimal Tag Size},
    howpublished = {Cryptology ePrint Archive, Report 2015/311},
    year = {2015},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.