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A new definition of the contrast of visual cryptography scheme
Authors:Feng Liu  ChuanKun Wu
Affiliation:a The State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China
b Graduate University of Chinese Academy of Sciences, Beijing 100190, China
c Computer Science and Technology, Ocean University of China, Qingdao 266100, China
Abstract:In this paper, some of the known definitions of the contrast of the Visual Cryptography Scheme (VCS) are shown to be inappropriate, and a new definition of the contrast based on our observations is proposed. It is also shown how our new definition of the contrast agreed with our observations.
Keywords:Cryptography   Visual cryptography   Secret sharing   Contrast
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