Cryptology ePrint Archive: BibTeX Citation of Report 2011/576

@misc{cryptoeprint:2011:576,
    author = {Jing Liu, Qiong Huang, Bo Yang, Yang Zhang},
    title = {Efficient Multicast Key Distribution Using HOWP-Based Dynamic Group Access Structures},
    howpublished = {Cryptology ePrint Archive, Report 2011/576},
    year = {2011},
    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.