An efficient verifiable secret sharing using steganographic technology based on convolutional codes for halftone images

This work presented not only a modified verifiable secret sharing (VSS) system but also a high security halftone image with low distortion. Reliability of sequence transmission is required in the design of VSS systems. Another major topic of VSS systems for transmission is the control of binary errors so that the VSS sequence can be reliably reproduced. The modified VSS systems differ from original VSS systems in that the output of systems and encoded technology are combined into a merging system. The embedding distortion directly influences the security of images; thus, modified VSS systems emphasize distortion level. Modified VSS systems have some advantages over conventional VSS systems: (1) the modified VSS systems are capable of achieving the reliability; (2) the proposed schemes offer low computational cost; and (3) they allow multiple shadows.