Visual Cryptography Schemes with Dihedral Group Access Structure for Many Images.

Miyuki Uno M. Kano Visual Cryptography Schemes with Dihedral Group Access Structure for Many Images. 344-359 2007 conf/ispec/2007 ISPEC http://dx.doi.org/10.1007/978-3-540-72163-5_26 db/conf/ispec/ispec2007.html#UnoK07