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Cryptography 2018, 2(3), 24; https://doi.org/10.3390/cryptography2030024

A New Visual Multi-Secrets Sharing Scheme by Random Grids

Department of Computer Science and Information Engineering, National Chi Nan University, Nantou 54561, Taiwan
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Received: 19 August 2018 / Revised: 11 September 2018 / Accepted: 14 September 2018 / Published: 17 September 2018
(This article belongs to the Special Issue Visual Cryptography)
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Abstract

In (2, 2)-visual secret sharing (VSS) schemes, a common type of (k, n)-threshold VSS schemes, secret information can be decoded directly through only two shares by using a human vision system. Several studies have analyzed methods of simplifying the decoding process and refining encoding to pass more secret images through two identical shares. However, limited secret images are retrieved, and the quality of the recovered images is low. This paper proposes an advanced (2, 2)-VSS scheme that can embed N secret images into two rectangular shares. Compared with other related VSS schemes, more secret images can be encrypted and the distortion is adjustable in the proposed scheme, yielding more flexibility in theory and practice. View Full-Text
Keywords: visual secret sharing; random grids; image encryption visual secret sharing; random grids; image encryption
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Chang, J.J.-Y.; Huang, B.-Y.; Juan, J.S.-T. A New Visual Multi-Secrets Sharing Scheme by Random Grids. Cryptography 2018, 2, 24.

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