Communications of the ACM
New visual secret sharing schemes using probabilistic method
Pattern Recognition Letters
Probabilistic Visual Cryptography Schemes
The Computer Journal
Image encryption by random grids
Pattern Recognition
Friendly progressive visual secret sharing
Pattern Recognition
Image encryption by multiple random grids
Pattern Recognition
Visual secret sharing by random grids revisited
Pattern Recognition
Threshold visual secret sharing by random grids
Journal of Systems and Software
A high quality image sharing with steganography and adaptive authentication scheme
Journal of Systems and Software
An image-sharing method with user-friendly shadow images
IEEE Transactions on Circuits and Systems for Video Technology
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In 1994, Naor and Shamir firstly proposed the concept of visual secret sharing. By using a codebook to encode a binary image into sharing images, nobody can obtain the original information from any one of the shared images unless superimposing all shared images. Although the above method can protect the security of the binary image, pixel expansion and lossy recovery are two unsolved problem. To improve the disadvantages mentioned above, a new image sharing method is proposed in this paper. The proposed method firstly use linear equations of Hill cipher to divide an image into several sub-images. Then the concept of the random grid is applied to the sub-images and to construct the shared images. Experimental result shows that the proposed scheme can effectively improve the above drawbacks.