WiP: Security Enhanced Size Invariant Visual Cryptography with Perfect Reconstruction of White Pixels

TLDR: From the analysis, it is proved that the proposed method enhances the security and maintain the contrast and is proposed for size invariant block wise encoding VCS based on perfect reconstruction of white pixels which provides perfect security and retains the contrast.

Abstract: Visual Cryptography is an image encryption technique which reconstructs the image using human visual system. Presently used size invariant visual cryptography schemes (VCS) does not preserves both security and contrast conditions. In this paper we proposed a new method for size invariant block wise encoding VCS based on perfect reconstruction of white pixels which provides perfect security and retains the contrast. Here we have discussed an outline of size invariant VCS based on random basis column pixel expansion, block wise encoding and random basis VCS with perfect reconstruction of white pixels (PRWP) which have been demonstrated based on various research studies. We have also discussed the demerits of the existing models and made an experimental analysis between previous models and the proposed model. From the analysis we proved that the proposed method enhances the security and maintain the contrast.