@misc{cryptoeprint:2008:098,
    author = {Xu-An Wang and Xiaoyuan Yang and  Yiliang Han},
    title = {On Security Notions for Verifiable Encrypted Signature},
    howpublished = {Cryptology ePrint Archive, Report 2008/098},
    year = {2008},
    url = {http://eprint.iacr.org/2008/098},
}