====== Visual Cryptography ======
  * Slides wit principles http://www.slideshare.net/valicac/visual-cryptography
  * Java applet for generating k out of n shares (very nice): http://www-sec.uni-regensburg.de/vc/ 
  * links to VC software: http://users.telenet.be/d.rijmenants/en/visualcrypto.htm
  * Java App for simple 2 shares VC: http://www.r-hansen.com/tech/oti.html