Improved Contrast for Threshold Random-grid-based Visual Cryptography

doi:10.3837/tiis.2018.07.022

Cited by 3 publications

(4 citation statements)

References 35 publications

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“…From Table 4, the correlation of restored image has the same value that indicates the proposed scheme, provides high visual quality reconstruction. Hao et al 2018, the proposed scheme reveals the secret image with high visual quality. The computational complexity of schemes using pixel expansion and polynomial based sharing schemes is order of O (n log 2 n) and O (h.lgh + s.k), while computational complexity of proposed scheme is O (n).…”

Section: Experimental Observationsmentioning

confidence: 96%

“…When n=0, the level contains the grayscale value is zero. If the threshold [18] value is n=t−1 the maximum grayscale of this level is not larger than maximum value 255. Finally, this transformation leads to generate binary image of m times the size.…”

Section: Fig 1 Traditional Visual Secret Sharing Schemementioning

confidence: 99%

“…Nowadays, multimedia data transmission has a significant growth in many web-enabled environments. Especially, multimedia communication [18] used in mobile applications, web conferences, social networks, e-banking and engineering applications. At present, it is widely used in intelligent highway applications and mobile ad-hoc networks.…”

Section: Introductionmentioning

confidence: 99%

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An Intelligent 2D Secret Share Construction using Visual Cryptography for Secure Transmission

2020

KSII TIIS

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Data Security is the most challenging area in Internet communication, where most of the secret sharing schemes are proposed for binary images. But still it lacks in providing security for data communication, especially in image transmission. Traditional visual cryptography scheme generate meaningless diwies and the reconstruction phase leads to quality degradation over the secret image. In this work, an intelligent two dimensional secret share construction scheme is proposed. A secret image is expanded into n diwies with the choice of scheme selection. By Stacking all the qualified diwies to revert the secret image without content loss and less than s* -1 shares could not reveal any information about the secret image. The experimental results emphasize that the proposed secret share scheme is highly secured for image transmission.

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Section: Experimental Observationsmentioning

confidence: 96%

Section: Fig 1 Traditional Visual Secret Sharing Schemementioning

confidence: 99%

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An Intelligent 2D Secret Share Construction using Visual Cryptography for Secure Transmission

2020

KSII TIIS

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“…Concerning to perceptual quality, Wu et al [9] constructed a contrastenhanced RG scheme and post-processing to obtain an even reconstructed image. Hu et al [10] improved the contrast of (k,n) RG by carefully arranging pixel positions. Wu et al [11] 2 VOLUME XX, 2020…”

Section: Introductionmentioning

confidence: 99%

Size-Invariant Visual Cryptography With Improved Perceptual Quality for Grayscale Image

Sun¹,

Fu²,

Yu³

2020

IEEE Access

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The reconstructed image of the size-invariant visual cryptography (VC) is inevitably accompanied by the loss of secret image information and the degradation of perceptual quality. Here, the halftone technique comes to the forefront since it can realistically simulate the grayscale image from a discrete binary image. Thus, by combining VC sharing with grayscale image halftone technique, this paper proposes a size-invariant VC scheme for grayscale image underpinned by the efficient direct binary search (EDBS) algorithm, in which the multi-pixel encryption VC sharing is adopted into the EDBS halftone process. Through local optimizations and global iterations, the optimal reconstructed image is obtained. To further enhance the contrast of the reconstructed image with limited computational power, the image information is probabilistically extracted according to the inverse mapping in the codebook. It is theoretically proved that the proposed scheme is as secure as the traditional VC, while its effectiveness is validated through experiments and comparative analyses. INDEX TERMS Efficient direct binary search; grayscale image; multi-pixel encryption; perceptual quality; size-invariant; visual cryptography; visual secret sharing.

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A Novel Three-Layer QR Code Based on Secret Sharing Scheme and Liner Code

Liu

2019

Security and Communication Networks

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Quick Response (QR) code, a machine-readable symbol, is widely employed in all walks of life due to its large information capacity, strong error correction ability, and fast reading speed. However, anyone with a standard decoder could obtain stored information. In this paper, utilizing the characteristics of the Hamming code, wet paper code, and the recognition mechanism of the QR code, we introduce a high-capacity QR code with three-layer information to protect the sensitive information. In the proposed scheme, we utilize the XOR-based secret-sharing algorithm to embed the second-layer information on the column vector of the constructed random matrix block. Then, without affecting the embedding result of the second layer information, the matrix block elements are reused again, and the Hamming code is constructed with the column vector. Based on the error correction mechanism of the Hamming code, the third layer of information is embedded on the column vector and encoded by wet paper coding to realize the blind extraction. Finally, based on the recognition mechanism of the QR code, the random matrix block containing the secret information is fused with the carrier QR code, and the public information of the carrier QR code is used as the first-layer information. Compared with other schemes, the proposed scheme has the advantages of high information payload, low computational complexity, and strong robustness.

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Improved Contrast for Threshold Random-grid-based Visual Cryptography

Cited by 3 publications

References 35 publications

An Intelligent 2D Secret Share Construction using Visual Cryptography for Secure Transmission

An Intelligent 2D Secret Share Construction using Visual Cryptography for Secure Transmission

Size-Invariant Visual Cryptography With Improved Perceptual Quality for Grayscale Image

A Novel Three-Layer QR Code Based on Secret Sharing Scheme and Liner Code

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