A Lossless Secret Image Sharing Scheme based on Bit Sharing Visual Cryptography

Visual Cryptography is a technique to share the secret information in the images for achieving data/information security. The technique uses encryption and decryption techniques for protecting the data. The secret image is encrypted into number of shares and distributed to the multiple participants. In decryption, the secret image can be reconstructed by combining the subset of the shares using simple computations. In the proposed secret image sharing technique, secret image is partitioned or divided into four shares based on the bit sharing approach. These shares are then covered with different cover images before distributing to the participants. All four shares are required to reconstruct the original secret image.