@misc{cryptoeprint:2011:340,
    author = {Feng Liu, Peng Li, ChuanKun Wu},
    title = {Encrypting More Information in Visual Cryptography Scheme},
    howpublished = {Cryptology ePrint Archive, Report 2011/340},
    year = {2011},
    url = {http://eprint.iacr.org/2011/340},
}