@misc{cryptoeprint:2004:178,
    author = {S. G. Barwick and W.-A. Jackson and K. M. Martin and C. M. O'Keefe},
    title = {Optimal Updating of Ideal Threshold Schemes},
    howpublished = {Cryptology ePrint Archive, Report 2004/178},
    year = {2004},
    url = {http://eprint.iacr.org/2004/178},
}