@misc{cryptoeprint:2008:033,
    author = {Boaz Barak, Mohammad Mahmoody-Ghidardy},
    title = {Lower Bounds on Signatures From Symmetric Primitives},
    howpublished = {Cryptology ePrint Archive, Report 2008/033},
    year = {2008},
    url = {http://eprint.iacr.org/2008/033},
}