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Appl. Sci. 2016, 6(1), 18; doi:10.3390/app6010018

Fault-Tolerant Visual Secret Sharing Schemes without Pixel Expansion

1
Department of Computer Science and Information Engineering, National Chi Nan University, Nantou 54561, Taiwan
2
School of Computer Science and Engineering, The University of Aizu, Fukushima 965-8580, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Chih Jer Lin
Received: 30 November 2015 / Revised: 31 December 2015 / Accepted: 7 January 2016 / Published: 14 January 2016
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Abstract

Visual cryptography encrypts a secret image into two meaningless random images, called shares, such that it can be decrypted by human vision without any calculations. However, there would be problems in alignment when these two shares are staked by hand in practice. Therefore, this paper presents the fault-tolerant schemes of stacking two shares that are acquired from secret image encryption without pixel expansion. The main idea of these schemes is to combine several pixels as a unit and then to encrypt each unit into a specific combination of pixels. Both theoretical analysis and simulation results demonstrate the effectiveness and practicality of the proposed schemes. View Full-Text
Keywords: visual cryptography; visual secret sharing; random grid; tolerance; pixel expansion visual cryptography; visual secret sharing; random grid; tolerance; pixel expansion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Juan, J.S.-T.; Chen, Y.-C.; Guo, S. Fault-Tolerant Visual Secret Sharing Schemes without Pixel Expansion. Appl. Sci. 2016, 6, 18.

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