Two-in-one image secret sharing scheme based on boolean operations

Abstract

Two-in-one image secret sharing (TiOISS) scheme shares a secretimage into n multiple shadows. In the revealing process, stacking anyk (k ≤ n) shadows can decode a vague secret image in the first stage. It also canreveal the original secret image by computation in the second stage. ManyTiOISS schemes have proposed based on visual cryptography scheme (VCS)and polynomial-based image secret sharing (PISS). Since PISS reveals the secretimage by Lagrange’s interpolation, it needs complicated computation. In thispaper, we combine perfect black VCS with image secret sharing based onBoolean operations, and propose a new TiOISS scheme. Compared withexisting TiOISS schemes, our scheme only needs few XOR operations to revealthe secret image in the second-stage reconstruction phase.