Sciweavers

ICISC
2008

Visual Secret Sharing Schemes with Cyclic Access Structure for Many Images

13 years 10 months ago
Visual Secret Sharing Schemes with Cyclic Access Structure for Many Images
We consider a visual secret sharing scheme with cyclic access structure for n secret images and n shares, where two consecutive shares decode one secret image. This secret sharing scheme can be constructed by using Droste's method. However the contrast of its scheme is 1/(2n). In this paper, it is shown that for every integer n 4, there exists no construction of such a visual secret sharing scheme having a perfect black reconstruction and contrast at least 1/4. Also for every even integer n 4, a new construction of such a visual sharing scheme that satisfies a slightly weaker condition and has a contrast 1/4 is given.
Miyuki Uno, Mikio Kano
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2008
Where ICISC
Authors Miyuki Uno, Mikio Kano
Comments (0)