@misc{cryptoeprint:2009:415,
    author = {Ethan Heilman},
    title = {Attacks Against Permute-Transform-Xor Compression Functions and Spectral Hash},
    howpublished = {Cryptology ePrint Archive, Report 2009/415},
    year = {2009},
    url = {http://eprint.iacr.org/2009/415},
}