Sharing multiple secrets in digital images

Authors:
Chwei-Shyong Tsai;Chin-Chen Chang;Tung-Shou Chen
Affiliations:
Department of Computer Science and Information Engineering, National Chung Cheng University, 621 Chiayi, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chung Cheng University, 621 Chiayi, Taiwan, ROC;Department of Information Management, National Taichung Institute of Technology, Taichung City, 404 Taiwan, ROC
Venue:
Journal of Systems and Software
Year:
2002

Citing 3
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Abstract

The share of multiple secrets among participants in secret transmission is a critical topic for a new digital image scheme. The new scheme is derived from the least significant bit substitution method and the visual cryptography method. Given some secrets and a set of cover images, the proposed scheme will convert the secrets into many bit planes and modify the cover images based on these bit planes. In our method, each participant has a unique modified cover image called a stego-image. A pair of participants can therefore reconstruct a unique secret without destroying of its secrecy. Experiments shown that the quality of all stego-images is visually acceptable. The proposed scheme also prevents anyone who possesses only one stego-image from gaining information about the secret and the other stego-image.