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Open AccessArticle

A n-out-of-n Sharing Digital Image Scheme by Using Color Palette

1
Department of CSIE, National Dong Hwa University, Hualien 97401, Taiwan
2
Department of Computer Science and Engineering, Xi’an University of Technology, Xi’an 710021, China
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(7), 802; https://doi.org/10.3390/electronics8070802
Received: 15 April 2019 / Revised: 12 July 2019 / Accepted: 13 July 2019 / Published: 17 July 2019
(This article belongs to the Special Issue Signal Processing and Analysis of Electrical Circuit)
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Abstract

A secret image sharing (SIS) scheme inserts a secret message into shadow images in a way that if shadow images are combined in a specific way, the secret image can be recovered. A 2-out-of-2 sharing digital image scheme (SDIS) adopts a color palette to share a digital color secret image into two shadow images, and the secret image can be recovered from two shadow images, while any one shadow image has no information about the secret image. This 2-out-of-2 SDIS may keep the shadow size small because by using a color palette, and thus has advantage of reducing storage. However, the previous works on SDIS are just 2-out-of-2 scheme and have limited functions. In this paper, we take the lead to study a general n-out-of-n SDIS which can be applied on more than two shadow. The proposed SDIS is implemented on the basis of 2-out-of-2 SDIS. Our main contribution has the higher contrast of binary meaningful shadow and the larger region in color shadows revealing cover image when compared with previous 2-out-of-2 SDISs. Meanwhile, our SDIS is resistant to colluder attack. View Full-Text
Keywords: secret image sharing; digital image; n-out-of-n scheme; color palette; colluder attack secret image sharing; digital image; n-out-of-n scheme; color palette; colluder attack
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Yang, C.-N.; Sun, Q.-D.; Liu, Y.-X.; Wu, C.-M. A n-out-of-n Sharing Digital Image Scheme by Using Color Palette. Electronics 2019, 8, 802.

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