Cryptology ePrint Archive: BibTeX Citation of Report 2015/342

@misc{cryptoeprint:2015:342,
    author = {Yan Zhu and Xin Wang and Di Ma and Ruiqi Guo},
    title = {Identity-Set-based Broadcast Encryption supporting “Cut-or-Select” with Short Ciphertext},
    howpublished = {Cryptology ePrint Archive, Report 2015/342},
    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.