HP-VCS: A high-quality and printer-friendly visual cryptography scheme |
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| Affiliation: | 1. Cyberspace Institute of Advanced Technology, Guangzhou University, Guangzhou 510006, PR China;2. Institute of Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, PR China;3. Huakong TsingJiao Information Science (Beijing) Limited (TsingJiao), Beijing 100084, PR China;4. Big Data Center of State Grid Corporation of China, Beijing 100031, PR China;1. School of Computer Science and Technology, Harbin Institute of Technology, 150080 Harbin, China;2. Department of CSIE, National Dong Hwa University, Hualien 974, Taiwan;1. Department of Mathematics and Physics, North China Electric Power University, Baoding, Hebei 071003, China;2. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, China;1. Department of Computer Science and Information Engineering, Ming Chuan University, Taoyuan, Taiwan;2. Department of Electronic Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan |
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| Abstract: | Visual Cryptography Scheme (VCS) is a secret-sharing scheme which aims to encrypt a secret message into multiple shares and transmit them to participants over an untrusted communication channel. Although human vision can easily reveal the secret message by stacking a sufficient number of shares, this scheme reduces the visual quality of recovered images. This paper presents a novel high-quality and printer-friendly VCS. When providing high-quality recovery, this scheme keeps the size of the shares the same as the secret image. Experimental results show that, compared with previous work, the proposed scheme significantly improves the performance of recovered images. |
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| Keywords: | Visual cryptography scheme Image security Halftoning Color VCS |
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