@misc{cryptoeprint:2009:479,
    author = {Yu Sasaki and Lei Wang and Kazumaro Aoki},
    title = {Preimage Attacks on 41-Step SHA-256 and 46-Step SHA-512},
    howpublished = {Cryptology ePrint Archive, Report 2009/479},
    year = {2009},
    url = {http://eprint.iacr.org/2009/479},
}