Random grid-based threshold visual secret sharing with improved visual quality and lossless recovery ability

被引:9
|
作者
Liu, Xin [1 ,2 ]
Wang, Shen [1 ]
Yan, Xuehu [3 ]
Zhang, Weizhe [1 ]
机构
[1] Harbin Inst Technol, Sch Comp Sci & Technol, Harbin 150080, Heilongjiang, Peoples R China
[2] Harbin Univ Sci & Technol, Modern Educ Technol Ctr, Harbin 150080, Heilongjiang, Peoples R China
[3] Elect Engn Inst, Hefei 230037, Anhui, Peoples R China
基金
中国国家自然科学基金;
关键词
Visual cryptography; Visual secret sharing; Random grids; Progressive evaluation; Lossless recovery; IMAGE ENCRYPTION; CRYPTOGRAPHY; SCHEME;
D O I
10.1007/s11042-017-5482-3
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Visual secret sharing (VSS) by random grids (RG) has gained much attention since it avoids the pixel expansion problem as well as requires no basic matrixes design. However, most of the previous RG-based threshold VSS still suffer from low visual quality or worse reconstructed secrets when more shadows are stacked. In this paper, a new RG-based threshold VSS with improved visual quality and lossless recovery ability is proposed. The random bits are utilized to improve the visual quality as well as to decrease the darkness of the reconstructed secret image. And the secret image can be losslessly recovered in the proposed scheme if the computational device is available. Simulation results and analyzes show the effectiveness of the proposed scheme. In addition, this paper gave the preliminary definition and evaluation of progressive secret sharing (PSS) based on mathematical differential and expectations.
引用
收藏
页码:20673 / 20696
页数:24
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