Literature Survey on a NVSS Scheme for Sharing Digital Secret Image

Usual visual secret sharing scheme hide secret images in shares they are either printed or in digital form. Meaningful images or noise like pixels are appear due to hiding secret image in shares, but during the transmission of share it will increase interception risk. So visual secret sharing scheme suffer from transmission risk problem. To solve this problem the author proposed a natural image based visual secret sharing scheme. In that secret images are transferred through various media to secure the secret and participant. The proposed scheme can share one digital secret image over n- 1 arbitrary selected natural images and one noise-like share. Natural image is a combination of printed and digital image. Natural image and printed image generate one noise like share. The unaltered natural shares are different, thus reducing the transmission risk problem