@misc{cryptoeprint:2008:379,
    author = {Mihir Bellare and Todor Ristov},
    title = {Hash Functions from Sigma Protocols and Improvements to VSH},
    howpublished = {Cryptology ePrint Archive, Report 2008/379},
    year = {2008},
    url = {http://eprint.iacr.org/2008/379},
}