Authenticating visual cryptography shares using 2d barcodes
IWDW'11 Proceedings of the 10th international conference on Digital-Forensics and Watermarking
A new authentication based cheating prevention scheme in Naor-Shamir's visual cryptography
Journal of Visual Communication and Image Representation
Visual secret sharing with cheating prevention revisited
Digital Signal Processing
Color visual cryptography schemes for black and white secret images
Theoretical Computer Science
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In this paper, we consider the problem of cheating for visual cryptography schemes. Although the problem of cheating has been extensively studied for secret sharing schemes, little work has been done for visual secret sharing. We provide a formal definition of cheating for visual cryptography and new (2, n)-threshold and (n, n)-threshold schemes that are immune to deterministic cheating.