Sharing a Verifiable Secret Image using Forward Error Correction Code for Halftone Image

A novel verifiable secret sharing method for Verifiable secret sharing (VSS) in halftone image based on linear block code with a parity check matrix is proposed. The proposed method, which not only verifies a secret image but also introduces multiple shadows for multiple users. The proposed method adopts forward error correction code (FEC) strategy based on property of linear block codes. There are three advantages for the proposed method: (1)the proposed scheme is capable of offering multiple shadows, (2) The proposed scheme is of low computational cost and (3)The novel VSS allows users to verify the shadows or enhance the robustness of original shadows. Experimental results show that the proposed scheme is capable of efficiently verifying a secret image from a variety of users. Moreover, the VSS process multiple shadows without pixel expansion. The experimental results show that the novel VSS scheme is low computational complexity. Keywords— Hamming code, Visual secret sharing, halftone image, Error diffusion.