EVCK is a tool that implements a 2 out of 2 threshold extended visual cryptography scheme.
Born from the idea of G. Ateniese, C. Blundo, A. De Santis, and D. R. Stinson (Extended Schemes for Visual Cryptography) and for a seminar about it.
Encode I1 and I2 so that we can obtain SI by stacking together their transparencies.
The only requirement to run EVCK is Java 1.4
Download it, unzip and refer to the README file for more information about executing.
EVCK is released under the GNU General Public License (GPL). See COPYING file in the packages for more information.