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Optimum Pixel Expansions for Threshold Visual Secret Sharing Schemes
IEEE Transactions on Information Forensics and Security, 2011The optimal pixel expansion of an (n, n) visual cryptographic scheme (VCS) was proven as 2n-1 in 1995; and that of a (2, n)-VCS was proposed in 2002. Yet, most existing best pixel expansions of (k, n)-VCSs for k ≥ 3 have not been improved since 1996. Whether they are already optimal, and if not how to find the optimums have never been explored. In this
Shyong Jian Shyu, Ming Chiang Chen
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Reversible data hiding method based on pixel expansion and homomorphic encryption
Journal of Intelligent & Fuzzy Systems, 2020Digital image steganography algorithms usually suffer from a lossy restoration of the cover content after extraction of a secret message. When a cover object and confidential information are both utilised, the reversible property of the cover is inevitable.
R. Anushiadevi +3 more
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The image multiple secret sharing schemes without pixel expansion
2011 International Conference on Machine Learning and Cybernetics, 2011In this paper, two secret sharing schemes were proposed. The two schemes both have the characteristic that the share images they produced are with no pixel expansion. In encoding phase, the rotated share scheme creates two share images for hiding three secret images, whereas the Exclusive OR rotated scheme achieve three share images for hiding four ...
Ching-Lin Wang +2 more
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Threshold construction from specific cases in visual cryptography without the pixel expansion
Signal Processing, 2014Abstract Unexpanded shares can decrease the bandwidth and save storage in a visual cryptography scheme (VCS). To avoid the pixel expansion, some previous VCSs without the pixel expansion were given. However, most of them are only for specific cases other than general threshold (case).
Xuehu Yan, Shen Wang, Xiamu Niu
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Reversible Data Hiding Based on Three-Circular-Pixel Difference Expansion
Fundamenta Informaticae, 2009This paper proposes a reversible data hiding scheme based on three-circular-pixel (TCP) difference expansion. To embed a message in an image, the image is divided into three-pixel blocks, each of which is, then, transformed into a TCP block with two differences.
Ching-Chiuan Lin +2 more
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Data Hiding Using Multi-Pixel Difference Expansion
2018 3rd International Conference on Computer and Communication Systems (ICCCS), 2018This paper proposed a reversible multiple layer data hiding to improve the method proposed by Arham et al. Using the relevance of pixels to modify the block size and change the scan mode can enhance image embedded capacity so that the maximum embedding amount of the original block was increased from 3 bits to 8 bits.
Chin-Feng Lee, Jau Ji Shen, Yu Hua Lai
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An extended secret sharing scheme for colour images with fixed pixel expansion
International Journal of Electronic Security and Digital Forensics, 2008An extended visual secret sharing scheme uses multiple innocent-looking cover images to hide a secret image such that none discloses any portion of the secret. In this article, an extended secret sharing technique is proposed that shares a secret colour image in a couple of significant images using a fixed pixel expansion factor of 9 for a colour space
Rabia Sirhindi +2 more
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A novel visual secret sharing scheme for multiple secrets without pixel expansion☆
Expert Systems With Applications, 2010The main concept of the original visual secret sharing (VSS) scheme is to encrypt a secret image into n meaningless share images. It cannot leak any information of the shared secret by any combination of the n share images except for all of images. The shared secret image can be revealed by printing the share images on transparencies and stacking the ...
Shi-Jinn Horng +2 more
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Reversibility of image with balanced fidelity and capacity upon pixels differencing expansion
The Journal of Supercomputing, 2013Reversible data hiding has attracted considerable attention in recent years. Being reversible, the decoder can extract hidden data and recover the original image completely, and the difference expansion (DE) scheme can lead to a lossless pixel after secret data exacting.
Fu-Hau Hsu +3 more
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Pixel expansion-free grey-scale image sharing method
Imaging Science Journal, 2013In recent years, many visual secret sharing technologies have been proposed to protect the security of secret images (black and white, grey scale or colour images). In 2005, Lukac and Plataniotis used the concept of the Naor–Shamir method to propose a visual secret sharing technology for sharing secret grey-scale images based on bit-plane decomposition.
Der-Chyuan Lou
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