Maintaining the secrecy in visual cryptography schemes
A. Divya, Krishnamoorthi Ramalakshmi · 2011
Visual cryptography schemes suffer from the drawback of large pixel expansion of share images and bad visual quality of the recovered image. To provide secrecy, we go for pixel expansion and increasing number of shares, this causes the bad visual quality of the recovered image. In this paper, we construct (n, n)-VCS and OR and XOR operations are used for share creation and stacking process, which proves better in contrast and pixel expansion. The proposed method uses additional matrix to increase the secrecy of the message in XOR operation.