Constructions of general (k,n) reversible AMBTC-based visual cryptography with two decryption options |
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| Affiliation: | 1. Department of Computer Science and Information Engineering, National Dong Hwa University, Taiwan;2. Department of Computer Science, Jinan University, Guangzhou, China;3. Nanjing University of Information Science & Technology, Nanjing, China;4. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, China;1. College of Computer and Information Engineering, Xiamen University of Technology, Xiamen 361024, China;2. Department of Information Management, Chaoyang University of Technology, Taichung, Taiwan;1. Department of Computer Science, University of California, Irvine, USA;2. School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, China;3. Faculty of Information and Communication Technology, Mahidol University, Thailand;1. Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, Guangdong, China;2. University of Virginia, Department of ECE, Charlottesville, VA 22904, USA;3. BJUT Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China;1. Zhejiang University, State Key Laboratory of Fluid Power and Mechatronic Systems, Mechanical Engineering, 38 Zheda Road, Hangzhou 310027, China;2. Shanghai Key Laboratory of Aerospace Intelligent Control Technology, Shanghai Institute of Spaceflight Control Technology, Shanghai, China;1. School of Computer Science and Electronic Engineering, Hunan University, 410082 Changsha, China;2. College of Computer and Communication Engineering, Changsha University of Science and Technology, 410112 Changsha, China |
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| Abstract: | In this paper, a general method of threshold Reversible Absolute moment block truncation coding Visual Cryptography Scheme (RAVCS) is introduced for sharing a binary secret image into multiple absolute moment block truncation coding (AMBTC) shadows. A RAVCS is firstly proposed to encode a secret by referencing one ABMTC image. Then, the proposed RAVCS is adopted to share the same secret into multiple groups of shadows by referencing multiple images. Those multiple groups of shadows are distributed to participants according to a matrix generated by the proposed shadow distribution algorithms. When any k or more participants share their shadows, the secret image is revealed by OR or XOR decryption. Further, those AMBTC shadows can be losslessly reverted to their original forms. Sufficient theoretical analysis and extensive experimental results are provided in this paper, showing the effectiveness and advantages of the proposed method. |
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| Keywords: | Visual cryptography Block truncation coding Reversible Meaningful shadows OR decryption XOR decryption |
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