Some Visual Secret Sharing Schemes and Their Share Size

Abstract

Visual secret sharing scheme [1] permits a secret to be shared among participants using transparencies. In this paper, we show a general share construction method, and share sizes which is constructed by the method. Furthermore, we consider an improved constructing. Furthermore, we consider an improved constructing method of visual secret sharing scheme that can conceal some images in a series of transparencies, in such a wary that different images are seen as the number of stacking transparencies increases. We also introduce a type of (2,n) visual secret sharing scheme with has smaller number of the columns than [1] when the numbers of the rows are the same.