Some New Types of Visual Secret Sharing Schemes

Abstract

Visual secret sharing (VSS) scheme [1] is used to protect the visual secret by sending n transparencies to different participants such that k -1 or fewer of them have no information about the original image, but the image can be seen by stacking k or more transparencies. In this paper, we propose some new types of VSS schemes for different applications, and also show that VSS schemes could be interestingly applied to some real systems for identification. The new schemes include a VSS scheme which has the ability to detect the forged transparencies, a (1 →n)VSS scheme which can share n-1 secret images, and a new (2,n) scheme for the same share size. We also show that a hierarchical scheme is possible and easy for VSS scheme.