|
|||||
|
|
| Shift visual cryptography scheme of two secret images | |
| 作者姓名： | WANG Daoshun LUO Ping YANG Lu QI Dongxu DAI Yiqi |
| 作者单位： | Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China,Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China,Chengdu Institute of Computer Applications, Chinese Academy of Sciences, Chengdu 610041, China,School of Information Science and Technology, Zhongshan University, Guangzhou 510275, China,Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China |
| 基金项目： | Supported by the National Natural Science Foundation of China (Grant No. 60133020), Major State Basic Research Development Program of China (Grant No.1998030420, G1998030602, G1998030608) and the Knowledge Innovation Program of the Chinese Academy of Sciences. |
| 摘 要： | A new visual cryptography scheme of two secret images, which is named the shift visual cryptography of two secret images, is given. The compound function family of a general construction model is also introduced. The uniqueness and validity of this model are proved, and the minimum rows and columns for realizing the scheme are obtained. Compared with visual cryptography of one secret image, the shift visual cryptography scheme can share two secret images with the same size of pixels expansion without losing the contrast. It has randomness and various forms, and furthermore, we can also visually recover two secret images even if the two shares are different in form and color. |
| 关 键 词： | visual cryptography compound function family minimum threshold scheme |
Shift visual cryptography scheme of two secret images |
|
| WANG Daoshun,LUO Ping,YANG Lu,QI Dongxu,DAI Yiqi.Shift visual cryptography scheme of two secret images[J].Progress in Natural Science,2003,13(6):457-463. | |
| Authors: | WANG Daoshun LUO Ping YANG Lu Qi Dongxu Dai Yiqi |
| Institution: | 1. Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China 2. Chengdu Institute of Computer Applications, Chinese Academy of Sciences, Chengdu 610041, China 3. School of Information Science and Technology, Zhongshan University, Guangzhou 510275, China |
| Abstract: | A new visual cryptography scheme of two secret images, which is named the shift visual cryptography of two secret images, is given. The compound function family of a general construction model is also introduced. The uniqueness and validity of this model are proved, and the minimum rows and columns for realizing the scheme are obtained. Compared with visual cryptography of one secret image, the shift visual cryptography scheme can share two secret images with the same size of pixels expansion without losing the contrast. It has randomness and various forms, and furthermore, we can also visually recover two secret images even if the two shares are different in form and color. |
| Keywords: | visual cryptography compound function family minimum threshold scheme |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 | |
| 点击此处可从《自然科学进展(英文版)》下载免费的PDF全文 | |