Traditional Visual Cryptography Scheme
This Demonstration implements the visual cryptography scheme described by Moni Naor and Adi Shamir. Move the two shares around to reveal the smiley face.
M. Naor and A. Shamir, "Visual Cryptography," in Advances in Cryptology—Eurocrypt '94, Perugia, Italy (A. DeSantis, ed.), Lecture Notes in Computer Science, 950, New York: Springer–Velag, 1995 pp. 1–12.