A discussion on the relationship between probabilistic visual cryptography and random grid

Yang, Ching-Nung; Wu, Chih-Cheng; Wang, Daoshun

doi:10.1016/j.ins.2014.03.033

Cited by 78 publications

(15 citation statements)

References 42 publications

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“…RG-VSS is close to probabilistic VSS [38], [39]. The RG encryption procedure in RG-VSS replaces the codebook (basic matrix) design in probabilistic VSS.…”

Section: Random Grid-based Vss (Rg-vss)mentioning

confidence: 99%

A Common Method of Share Authentication in Image Secret Sharing

Yan

Yang

et al. 2021

IEEE Trans. Circuits Syst. Video Technol.

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Because of the importance of digital images and their extensive application to digital watermarking, block chain, access control, identity authentication, distributive storage in the cloud and so on, image secret sharing (ISS) is attracting ever-increasing attention. Share authentication is an important issue in its practical application. However, most ISS schemes with share authentication ability require a dealer to participate in the authentication (namely, dealer participatory authentication). In this paper, we design an ISS for a (k, n)-threshold with separate share authentication abilities of both dealer participatory authentication and dealer nonparticipatory authentication. The advantages of polynomial-based ISS and visual secret sharing (VSS) are skillfully fused to achieve these two authentication abilities without sending a share by using a screening operation. In addition, the designed scheme has the characteristics of low decryption (authentication) complexity, lossless decryption and no pixel expansion. Experiments and theoretical analyses are performed to show the effectiveness of the designed scheme.

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“…RG-VSS is close to probabilistic VSS [38], [39]. The RG encryption procedure in RG-VSS replaces the codebook (basic matrix) design in probabilistic VSS.…”

Section: Random Grid-based Vss (Rg-vss)mentioning

confidence: 99%

A Common Method of Share Authentication in Image Secret Sharing

Yan

Yang

et al. 2021

IEEE Trans. Circuits Syst. Video Technol.

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“…Cimato et al [14] introduced probabilistic VCS that can achieve better visual quality at the price of larger size expansion. Researchers proposed random grid based visual secret sharing schemes [15], [16]. These schemes can achieve non-expansible shadows.…”

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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“…When any k or more shadow images are collected, the secret image is restored by our human eyes without any computations (only Boolean OR operation), although some contrast loss appears; otherwise the number of the collected shadow images is less than k, the secret image cannot be restored even with high-performance computing devices and technologies [15,16]. In VC research field, random grids (RG)-based VC [17][18][19] is more feasible since RG-based VC has no pixel expansion and basic matrix design. VC can be applied to key management, password transmission [20], identity authentication [21,22], access control, digital watermarking [23][24][25][26], and distributive applications [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Applying Visual Cryptography to Enhance Text Captchas

et al. 2020

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Nowadays, lots of applications and websites utilize text-based captchas to partially protect the authentication mechanism. However, in recent years, different ways have been exploited to automatically recognize text-based captchas especially deep learning-based ways, such as, convolutional neural network (CNN). Thus, we have to enhance the text captchas design. In this paper, using the features of the randomness for each encoding process in visual cryptography (VC) and the visual recognizability with naked human eyes, VC is applied to design and enhance text-based captcha. Experimental results using two typical deep learning-based attack models indicate the effectiveness of the designed method. By using our designed VC-enhanced text-based captcha (VCETC), the recognition rate is in some degree decreased.

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A discussion on the relationship between probabilistic visual cryptography and random grid

Cited by 78 publications

References 42 publications

A Common Method of Share Authentication in Image Secret Sharing

A Common Method of Share Authentication in Image Secret Sharing

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

Applying Visual Cryptography to Enhance Text Captchas

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