@misc{cryptoeprint:2004:287,
    author = {Duong Quang Viet and Kaoru Kurosawa},
    title = {Almost Ideal Contrast Visual Cryptography with Reversing},
    howpublished = {Cryptology ePrint Archive, Report 2004/287},
    year = {2004},
    url = {http://eprint.iacr.org/2004/287},
}