@misc{cryptoeprint:2009:450,
    author = {Ali Aydin Selcuk, Kerem Kaskaloglu, Ferruh Ozbudak},
    title = {On Hierarchical Threshold Secret Sharing},
    howpublished = {Cryptology ePrint Archive, Report 2009/450},
    year = {2009},
    url = {http://eprint.iacr.org/2009/450},
}