Open AccessSecure information display with limited viewing zone by use of multi-color visual cryptography
Author(s) -
Hirotsugu Yamamoto,
Yoshio Hayasaki,
Nobuo Nishida
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.001258
Subject(s) - visual cryptography , decoding methods , computer science , computer vision , encryption , cryptography , artificial intelligence , computer graphics (images) , liquid crystal display , optics , secret sharing , algorithm , computer security , physics , operating system
We propose a display technique that ensures security of visual information by use of visual cryptography. A displayed image appears as a completely random pattern unless viewed through a decoding mask. The display has a limited viewing zone with the decoding mask. We have developed a multi-color encryption code set. Eight colors are represented in combinations of a displayed image composed of red, green, blue, and black subpixels and a decoding mask composed of transparent and opaque subpixels. Furthermore, we have demonstrated secure information display by use of an LCD panel.