Cryptology ePrint Archive: BibTeX Citation of Report 2015/248

@misc{cryptoeprint:2015:248,
    author = {Ryo Nishimaki and Keita Xagawa},
    title = {Verifiably Encrypted Signatures with Short Keys based on the Decisional Linear Problem and Obfuscation for Encrypted VES},
    howpublished = {Cryptology ePrint Archive, Report 2015/248},
    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.