Cryptology ePrint Archive: BibTeX Citation of Report 2015/756

@misc{cryptoeprint:2015:756,
    author = {Yandong Zheng, Hua Guo},
    title = {Cryptanalysis of an Improved One-Way Hash Chain Self-Healing Group Key Distribution Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2015/756},
    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.