Cryptology ePrint Archive: BibTeX Citation of Report 2013/880

@misc{cryptoeprint:2013:880,
    author = {Seunghwan Park and Kwangsu Lee and Dong Hoon Lee},
    title = {New Constructions of Revocable Identity-Based Encryption from Multilinear Maps},
    howpublished = {Cryptology ePrint Archive, Report 2013/880},
    year = {2013},
    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.