Digital halftoning
Computer generated color: a practical guide to presentation and display
Computer generated color: a practical guide to presentation and display
Visual cryptography for general access structures
Information and Computation
Constructions and Properties of k out of nVisual Secret Sharing Schemes
Designs, Codes and Cryptography
Extended capabilities for visual cryptography
Theoretical Computer Science
Visual Authentication and Identification
CRYPTO '97 Proceedings of the 17th Annual International Cryptology Conference on Advances in Cryptology
Efficient visual secret sharing scheme for color images
Pattern Recognition
Image encryption by multiple random grids
Pattern Recognition
Visual secret sharing by random grids revisited
Pattern Recognition
Preventing Cheating in Computational Visual Cryptography
Fundamenta Informaticae
Friendly Color Visual Secret Sharing by Random Grids
Fundamenta Informaticae
Journal of Visual Communication and Image Representation
Threshold visual secret sharing by random grids
Journal of Systems and Software
Near-optimal time function for secure dynamic visual cryptography
ISVC'11 Proceedings of the 7th international conference on Advances in visual computing - Volume Part II
Visual Multiple-Secret Sharing by Circle Random Grids
SIAM Journal on Imaging Sciences
Multi-image encryption by circular random grids
Information Sciences: an International Journal
Improving the visual quality of size invariant visual cryptography scheme
Journal of Visual Communication and Image Representation
Random grid-based visual secret sharing for general access structures with cheat-preventing ability
Journal of Systems and Software
Medical image protection using secret sharing scheme
Proceedings of the 6th International Conference on Ubiquitous Information Management and Communication
Yet another multiple-image encryption by rotating random grids
Signal Processing
Optimal (2,n) and (2,infinity) visual secret sharing by generalized random grids
Journal of Visual Communication and Image Representation
Preventing Cheating in Computational Visual Cryptography
Fundamenta Informaticae
Random grid-based visual secret sharing with abilities of OR and XOR decryptions
Journal of Visual Communication and Image Representation
Image sharing method for gray-level images
Journal of Systems and Software
Enhancing the perceived visual quality of a size invariant visual cryptography scheme
ICICS'12 Proceedings of the 14th international conference on Information and Communications Security
Improving the visual quality of random grid-based visual secret sharing
Signal Processing
Quality-adaptive visual secret sharing by random grids
Journal of Systems and Software
XOR-based meaningful visual secret sharing by generalized random grids
Proceedings of the first ACM workshop on Information hiding and multimedia security
Threshold visual secret sharing by random grids with improved contrast
Journal of Systems and Software
Improved tagged visual cryptography by random grids
Signal Processing
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A random grid in this paper is a transparency comprising a two-dimensional array of pixels that are either transparent or opaque determined in a totally random way. We design algorithms by using random grids to accomplish the encryption of the secret gray-level and color images in such a way that neither of the two encrypted shares alone leaks the information of the secret image, whereas the secret can be seen when these two shares are superimposed. The decryption process is done by our visual system and no computation is required. As compared to the approaches in visual cryptography, our algorithms do not need the basis matrices to encode the shares so that the problem of pixel expansion exists no more; that is, the sizes of the secret image and the encrypted shares are the same.