New extended visual cryptography schemes with clearer shadow images

Yang, Ching-Nung; Yang, Yao-Yu

doi:10.1016/j.ins.2014.02.099

Cited by 32 publications

(7 citation statements)

References 45 publications

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“…7,8,9, and 10, all shadows are noise-like, hence every single shadow gives (1) The weakness of Construction 1 is that the darkness of specific shadow is high, and degrades the visual quality of reconstructed image. (2) Construction 2 is only for the case (1; 2; n), where t ¼ 1 and k ¼ 2.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, there were some specific VCSs, such as sharing multiple secrets, revealing meaningful shadow, achieving ideal contrast, solving alignment problem, sharing color image, retaining invariant aspect ratio, providing region incrementing property, providing progressive recovery, and adopting XOR operation, which were subsequently proposed [6][7][8][9][10][11][12][13][14]. Considering some intended applications, we believe that the novel and unique stacking-to-see property of VCS is very suitable to securely and cheaply share short messages, e.g., passwords or safecombination, represented in the alphanumeric characters.…”

Section: Introductionmentioning

confidence: 99%

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Design a new visual cryptography for human-verifiable authentication in accessing a database

Yang

Sun

Yan

et al. 2015

J Real-Time Image Proc

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Visual cryptographic scheme (VCS) has an attractive property of decoding that can be performed directly by the human visual system without any computation. This novel stacking-to-see property of VCS can be secure and cheap used for visual authentication in accessing a data base. In this paper, we design a new participantspecific VCS (PSVCS) to extend the authentication scenario from a single-client authentication in VCS-based authentication schemes to a group of clients with specific threshold property. The proposed (t; k; n)-PSVCS, where t k n, needs t specific participants and other (k À t) participants to decode the secret image. When compared with previous VCS-based authentication schemes, our PSVCS-based authentication can provide different privileges to clients and is more suitable for real environment.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design a new visual cryptography for human-verifiable authentication in accessing a database

Yang

Sun

Yan

et al. 2015

J Real-Time Image Proc

Self Cite

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“…VCS with meaningful shadows is termed as Extended Visual Cryptography (EVCS) [6,7]. This EVCS overcomes the problem of suspicion which is faced by VCS with noise like shares.…”

Section: Extended Visual Cryptography Scheme (Evcs)mentioning

confidence: 99%

“…The VCSs which were initially developed dealt with noise like shares, leading to suspicion and attacks. To overcome this drawback, VCS with meaningful shares was created [6,7]. This VCS with meaningful shares is termed as Extended Visual Cryptography Scheme (EVCS) and was also developed without pixel expansion [8,9].…”

Section: Introductionmentioning

confidence: 99%

Implementation of TiOISSS with meaningful shadows and with an additional authentication image

Srividhya

Sathishkumar²,

Sudha

2016

Journal of Visual Communication and Image Representation

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“…Although VCS has the advantage of stacking-to-see decoding property, the visual quality of the revealed image is degraded. Following with Naor and Shamir's pioneer work, many VCSs were proposed with special properties, such as sharing gray and color images [2]- [4], progressive recovering VCS [5]- [7], sharing multiple images [8], [9], and VCS with meaningful shadows [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

A Construction Method of (2, 3) Visual Cryptography Scheme

Yin

2020

IEEE Access

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Visual cryptography scheme (VCS) shares a binary secret image into multiple shadows, stacking qualified set of shadows will decode the secret image without computer resources. In this paper, we propose a (2, 3)-VCS, which can share one or two secret images into 3 shadows, stacking any two shadows will reveal the secret image. The shadow size is 3/2 times of the secret image. The contrasts of the revealed image are 1/3 and 1/2 when we share one and two secret images, respectively. We can also reveal the secret image by XOR decoding operation, and the visual quality of the revealed image can be further improved. By XOR decoding operation, the contrasts of the revealed image will be 2/3 and 1 when we share one or two secret images, respectively. In the case of sharing two secret images, the revealed two secret images have no distortion. Theoretic analysis and experimental results demonstrate the feasibility and advantages of the proposed (2, 3)-VCS.

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New extended visual cryptography schemes with clearer shadow images

Cited by 32 publications

References 45 publications

Design a new visual cryptography for human-verifiable authentication in accessing a database

Design a new visual cryptography for human-verifiable authentication in accessing a database

Implementation of TiOISSS with meaningful shadows and with an additional authentication image

A Construction Method of (2, 3) Visual Cryptography Scheme

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