@misc{cryptoeprint:2003:240,
    author = {Michael Backes and Dennis Hofheinz},
    title = {How to Break and Repair a Universally Composable Signature Functionality},
    howpublished = {Cryptology ePrint Archive, Report 2003/240},
    year = {2003},
    url = {http://eprint.iacr.org/2003/240},
}