Security
viscrypt.txt
Associated article: Extended Visual Cryptography Schemes
Tags: Security Design
Published source code accompanying the article by Daniel Stoleru in which he examines Extended Visual Cryptography Schemes--graphical forms of information concealing.
Extended Visual Cryptography Schemes
by Daniel Stoleru
Listing One
#dithering mask four-point star type
_starMask = ((40, 80, 140, 120, 20),
(60, 170, 210, 190, 100),
(150, 240, 250, 230, 160),
(90, 200, 220, 180, 50),
(10, 110, 130, 70, 30))
#dithering mask box type
_boxMask = ((138, 230, 5, 219, 107),
(87, 46, 179, 67, 148),
(189, 26, 250, 15, 199),
(158, 77, 168, 56, 97),
(128, 209, 36, 240, 117))
Listing Two
def encrypt(self, mask = _boxMask):
""" Perform the actual dithering algorithm. For any pixel in the
...
