| Multi secret image color visual cryptography schemes for general access structures |
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| 作者姓名： | YI Feng WANG Daoshun LUO Ping HUANG Liansheng DAI Yiqi |
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| 作者单位： | Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China |
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| 基金项目： | 中国科学院资助项目;国家重点基础研究发展计划(973计划) |
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| 摘 要： | In the proposed visual cryptography schemes for general access structures, the single secret image black-and-white visual cryptography schemes with meaningful shares have been constructed, in which the shares are innocent looking images. The meaningful shares have not been realized in single secret image color schemes; neither have the multi secret images color schemes. In this paper, the multi secret images color visual cryptography schemes for general access structures with meaningful shares are constructed by the method of matrix concatenation, the pixel expansion is obtained, and the validity of the scheme is proven. In our scheme, the different combination of meaningful color shares can be used to recover distinct color secret images. The multi secret images black-and-white visual cryptography scheme is a special case of our color scheme.
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| 关 键 词： | visual cryptography secret sharing scheme general access structure. |
Multi secret image color visual cryptography schemes for general access structures |
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| YI Feng,WANG Daoshun,LUO Ping,HUANG Liansheng,DAI Yiqi.Multi secret image color visual cryptography schemes for general access structures[J].Progress in Natural Science,2006,16(4):431-436. |
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| Authors: | YI Feng WANG Daoshun LUO Ping HUANG Liansheng DAI Yiqi |
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| Institution: | Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China |
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| Abstract: | In the proposed visual cryptography schemes for general access structures, the single secret image black-and-white visual cryptography schemes with meaningful shares have been constructed, in which the shares are innocent looking images. The meaningful shares have not been realized in single secret image color schemes; neither have the multi secret images color schemes. In this paper, the multi secret images color visual cryptography schemes for general access structures with meaningful shares are constructed by the method of matrix concatenation, the pixel expansion is obtained, and the validity of the scheme is proven. In our scheme, the different combination of meaningful color shares can be used to recover distinct color secret images. The multi secret images black-and-white visual cryptography scheme is a special case of our color scheme. |
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| Keywords: | visual cryptography secret sharing scheme general access structure |
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