@misc{cryptoeprint:2012:680,
    author = {Oriol Farras,Carles Padro,Chaoping Xing, and An Yang},
    title = {Natural Generalizations of Threshold Secret Sharing},
    howpublished = {Cryptology ePrint Archive, Report 2012/680},
    year = {2012},
    url = {http://eprint.iacr.org/2012/680},
}