@misc{cryptoeprint:2011:652,
    author = {Shay Gueron and Michael Kounavis},
    title = {Security Enhancement of the Vortex Family of Hash Functions},
    howpublished = {Cryptology ePrint Archive, Report 2011/652},
    year = {2011},
    url = {http://eprint.iacr.org/2011/652},
}