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This article describes how the (k, n) threshold image secret sharing technology can recover the secret image even n − k shares are lost, or n−k servers do not work, which is useful for cloud storage, etc. Image secret sharing for general access structure (GAS) is more general than (k, n) threshold. Image secret sharing with a meaningful share will decrease encryption suspicion so that the security can be enhanced. However, traditional studies have no image secret sharing construction approach for GAS with a meaningful share. In the article, they first exploit an image secret sharing construction approach for GAS with meaningful share. Following their construction approach, the authors develop a random grid (RG)-based visual secret sharing (VSS) algorithm for GAS with meaningful share as well as polynomial-based image secret sharing for GAS with meaningful share. The experiments with this concept exhibit the effectiveness of the algorithms and further their construction approach.

Image Secret Sharing Construction for General Access Structure with Meaningful Share