Cryptology ePrint Archive: BibTeX Citation of Report 2013/698

@misc{cryptoeprint:2013:698,
    author = {Xi-Jun Lin and Lin Sun},
    title = {Cryptanalysis and improvement of a dynamic and secure key management model for hierarchical heterogeneous sensor networks},
    howpublished = {Cryptology ePrint Archive, Report 2013/698},
    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.