Cryptology ePrint Archive: BibTeX Citation of Report 2013/189

@misc{cryptoeprint:2013:189,
    author = {Appala Naidu Tentu and Prabal Paul and  V Ch Venkaiah},
    title = {Ideal and Perfect Hierarchical Secret Sharing Schemes based on MDS codes},
    howpublished = {Cryptology ePrint Archive, Report 2013/189},
    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.