@misc{cryptoeprint:2013:230,
    author = {Yang Wang and Mark Manulis and Man Ho Au and Willy Susilo},
    title = {Relations among Privacy Notions for Signcryption and Key Invisible "Sign-then-Encrypt''},
    howpublished = {Cryptology ePrint Archive, Report 2013/230},
    year = {2013},
    url = {http://eprint.iacr.org/2013/230},
}