@misc{cryptoeprint:2008:152,
    author = {Michael Backes and Dominique Unruh},
    title = {Computational Soundness of Symbolic Zero-Knowledge Proofs Against Active Attackers},
    howpublished = {Cryptology ePrint Archive, Report 2008/152},
    year = {2008},
    url = {http://eprint.iacr.org/2008/152},
}