Results 21 to 30 of about 1,969 (259)
Extended capabilities for visual cryptography
Theoretical Computer Science, 2001 An extended visual cryptography scheme, for an access structure \((\Gamma_{Qual},\Gamma_{Forb})\) on a set of \(n\) participants, is a technique to encode \(n\) images in such a way that when we stack together the transparencies associated to participants in any set \(X \in \Gamma_{\text{Qual}}\) we get the secret message with no trace of the original ...
BLUNDO, Carlo +3 more
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Alternative product authentication system using visual cryptography
Semina: Ciências Exatas e Tecnológicas, 2020 Fraud and counterfeiting have caused various inconveniences to manufacturers and the product consumer market. To avoid counterfeiting and, therefore, bring a higher level of trust and security in commercial transactions, several authentication techniques
Rodrigo dos Santos Cicareli +1 more
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A Lightweight Privacy-Preserving System for the Security of Remote Sensing Images on IoT
Remote Sensing, 2022 The acquisition of massive remote sensing data makes it possible to deeply fuse remote sensing and artificial intelligence (AI). The mobility and cost advantages of new sensing platforms in the Internet of Things (IoT) make them ideal for continuous ...
Denghui Zhang +3 more
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Perfect contrast visual cryptography scheme
Tongxin xuebao, 2009 A perfect contrast visual cryptography scheme with the best contrast based on both the perfect black visual cryptography scheme（PBVCS） and the non-perfect black visual cryptography scheme（NPBVCS） was proposed.The proposed scheme applied simple Boolean ...
HAN Yan-yan1, HE Wen-cai1, HU Yu-pu1
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Visual cryptography scheme on graphs with $m^{*}(G)=4$ [PDF]
Transactions on Combinatorics, 2019 Let $G=(V,E)$ be a connected graph and $\Gamma (G)$ be the strong access structure where obtained from graph $G$. A visual cryptography scheme (VCS) for a set $P$ of participants is a method to encode a secret image such that any pixel of this image ...
Mahmood Davarzani
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Lossless sharing visual cryptography
Tongxin xuebao, 2013 According to the information loss during the secret image sharing process, the lossless sharing visual crypto-graphy was proposed. The optimizations of two parameters were simplified into one parameter.
Bin YU, Zheng-xin FU
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Safeguarding images over insecure channel using master key visual cryptopgraphy
Ain Shams Engineering Journal, 2018 Sharing secrets and safeguarding them while being sent over insecure channel is a crucial matter. Visual Cryptography still has the strong potential to secure this critical issue.
May A. Salama +2 more
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Applying Visual Cryptography to Enhance Text Captchas
Mathematics, 2020 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 ...
Xuehu Yan +3 more
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PiouCrypt: Decentralized lattice-based method for visual symmetric cryptography
Franklin Open, 2023 In recent years, establishing secure visual communications has turned into one of the essential problems for security engineers and researchers. However, only limited novel solutions are provided for image encryption, and limiting visual cryptography to ...
Navid Abapour, Mohsen Ebadpour
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A cheating prevention EVC scheme using watermarking techniques
Revista Facultad de Ingeniería Universidad de Antioquia, 2012 Visual Cryptography (VC), proposed by Naor and Shamir in 1994, is a variation of the conventional secret sharing scheme. In VC, instead of a numerical secret key, a secret image is shared among participants in the form of images called shares.
Angelina Espejel Trujillo +3 more
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