Journal ArticleDOI
Threshold visual secret sharing by random grids
Tzung-Her Chen,Kai-Hsiang Tsao +1 more
TLDR
A threshold RG-based VSS scheme aiming at providing the wide-use version is presented, and the experimental results and theoretically analysis in visual quality and security show that the proposed scheme performs well.About:
This article is published in Journal of Systems and Software.The article was published on 2011-07-01. It has received 203 citations till now. The article focuses on the topics: Secret sharing & Visual cryptography.read more
Citations
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Journal ArticleDOI
An enhanced threshold visual secret sharing based on random grids
TL;DR: A new threshold RG-based VSS scheme aiming at improving the visual quality of the previewed image is presented and can gain better visual quality in the reconstructed images as well as (k, n) threshold.
Journal ArticleDOI
Improving the visual quality of random grid-based visual secret sharing
Xiaotian Wu,Wei Sun +1 more
TL;DR: Two algorithms, including a contrast-enhanced RG-based VSS and a void-and-cluster-based (VAC-based) post-processing, are introduced to improve the reconstructed image quality, illustrating that competitive visual quality is obtained by combined use of these two methods.
Journal ArticleDOI
Threshold visual secret sharing by random grids with improved contrast
Teng Guo,Feng Liu,Chuankun Wu +2 more
TL;DR: The experimental results show that the proposed scheme outperforms Chen and Tsao (2011)'s scheme significantly in visual quality, and improves the contrast of Chen andTsao ( 2011)'s threshold scheme.
Journal ArticleDOI
Random grid-based visual secret sharing with abilities of OR and XOR decryptions
Xiaotian Wu,Wei Sun +1 more
TL;DR: A novel RG-based VSS is developed, where the secret image can be recovered in two situations: (1) when computational devices are not available, the secret images can be reconstructed by stacking the shares directly, and (2) when some light-weight computational Devices are available,The secret imageCan be decrypted by XOR operation, and the decrypted secret image quality is approximately the same as that of conventional RG- based VSS.
Journal ArticleDOI
A discussion on the relationship between probabilistic visual cryptography and random grid
TL;DR: The probabilistic VCS without pixel expansion is used, to study the construction and performance of RG, and it is pointed out that RG and PVCS have no difference other than the terminology, which is a subset of PVCSs.
References
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Visual Cryptography
Moni Naor,Adi Shamir +1 more
TL;DR: In this paper, a new type of cryptographic scheme, which can decode concealed images without any cryptographic computations, is proposed, which is called k-out-of-n secret sharing.
Journal ArticleDOI
Encryption of pictures and shapes by random grids.
Oded Kafri,Eliezer Keren +1 more
TL;DR: A low-cost and simple technique for encryption of two-dimensional patterns and shapes based on the superposition of random grids is suggested and demonstrated.
Journal ArticleDOI
Image encryption by random grids
TL;DR: This paper designs algorithms by using random grids to accomplish the encryption of the secret gray-level and color images in such a way that neither of the two encrypted shares alone leaks the information of thesecret image, whereas the secret can be seen when these two shares are superimposed.
Book ChapterDOI
Visual Authentication and Identification
Moni Naor,Benny Pinkas +1 more
TL;DR: In this article, the problem of authentication by a human recipient who does not use any trusted computational device has been studied in the context of smartcard-human interaction, in particular in the case of electronic wallets.
Journal Article
Visual authentication and identification
Moni Naor,Benny Pinkas +1 more
TL;DR: In this paper, the authors introduce visual authentication and visual identification methods, which are authentication and identification methods for human users based on visual cryptography and can be implemented using very common low-tech technology.