Secret Image Sharing with High Quality Stego Images

In this paper, we propose a novel (t,n)-threshold secret sharing scheme. The scheme employs the concept of cellular automata and is suitable for sharing secret images. The scheme divides the secret image into some shadows which are then embedded in predetermined cover images and the resulting stego images are distributed among participants. The probability that a participant can successfully tamper his/her data is about 1/256 and the computational complexity of the secret recovery process is O(n). Instead of embedding authentication bits in cover images, our scheme hides those in cellular automata and therefore our stego images are of high quality. Moreover, the original secret images can be restored completely without any distortion. We further conduct experiments to compare the scheme with previous methods.

کلیدواژه ها:

Secret Sharing Scheme ، Linear Memory Cellular Automata ، Authentication Verifiability