一种无损恢复的多级别的可视密码方案
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摘要
针对传统可视密码方案存在像素扩展且只能恢复一幅秘密图像的问题,提出无像素扩展的多秘密可视密码方案。基于随机栅格理论和异或运算对多个级别的秘密图像进行分存,对各个级别的分存图像进行异或即可依次恢复所有级别的秘密图像。可以实现二值秘密图像的无损恢复,并可扩展到灰度图像和彩色图像。图像传输引入纠错编码机制,提高方案的可靠性。实验结果表明分存图像没有像素扩展,恢复图像与原秘密图像相比无失真且能满足安全性要求。
Traditional visual cryptography schemes presented pixel expansion and could only share one secret image. This paper proposed a multi-level visual cryptography scheme without pixel expansion. The scheme processed multiple secret images based on random grids and XOR operation. Using XOR operation on each level could recovery all secrets respectively. It could realize lossless recovery of binary secret image,and could be extended to the gray image and color image. Image transfer process introduced error correction encoding mechanism to improve the reliability of the program. Simulation experiments demonstrate that the share images have no pixel expansion and the recovery images are the same as the original images. The analysis shows the scheme meets the security requirement.
Traditional visual cryptography schemes presented pixel expansion and could only share one secret image. This paper proposed a multi-level visual cryptography scheme without pixel expansion. The scheme processed multiple secret images based on random grids and XOR operation. Using XOR operation on each level could recovery all secrets respectively. It could realize lossless recovery of binary secret image,and could be extended to the gray image and color image. Image transfer process introduced error correction encoding mechanism to improve the reliability of the program. Simulation experiments demonstrate that the share images have no pixel expansion and the recovery images are the same as the original images. The analysis shows the scheme meets the security requirement.
引文
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[4]付正欣,郁滨.基于XOR运算的多秘密视觉密码[J].计算机应用研究,2011,28(2):708-710.
[5]郁滨,沈刚,付正欣.一种无损多秘密分享视觉密码方案[J].电子与信息学报,2012,34(12):2885-2890.
[6]闫沛敏.无损可视多秘密分享技术研究[D].西安:西安电子科技大学,2013.
[7]Kafri O,Keren E.Encryption of pictures and shapes by random grids[J].Optics Letters,1987,12(6):377-379.
[8]Wu Xiaotian,Sun Wei.Improved tagged visual cryptography by random grids[J].Signal Processing,2014,97(7):64-82.
[9]Chen T H,Tsao K H.Visual secret sharing by random grids revisited[J].Pattern Recognition,2009,42(9):2203-2217.
[10]Yan Xuehu,Wang Shen,El-Latif A A A,et al.Visual secret sharing based on random grids with abilities of AND and XOR lossless recovery[J].Multimedia Tools&Applications,2013,74(9):3231-3252.
[11]Zhong Guanshi,Wang Jianjun.Region incrementing visual secret sharing scheme based on random grids[C]//Proc of IEEE International Symposium on Circuits and Systems.New York:IEEE Press,2013:2351-2354.
[12]Shyu S J.Image encryption by multiple random grids[J].Pattern Recognition,2009,42(7):1582-1596.
[2]韩妍妍,胡予濮,何文才.基于多级别的一般存取结构可视密码方案[J].哈尔滨工业大学学报,2008,40(12):2075-2077.
[3]易枫,王道顺,戴一奇.一般存取结构的多密图彩色可视分存方案[J].自然科学进展,2006,16(1):95-100.
[4]付正欣,郁滨.基于XOR运算的多秘密视觉密码[J].计算机应用研究,2011,28(2):708-710.
[5]郁滨,沈刚,付正欣.一种无损多秘密分享视觉密码方案[J].电子与信息学报,2012,34(12):2885-2890.
[6]闫沛敏.无损可视多秘密分享技术研究[D].西安:西安电子科技大学,2013.
[7]Kafri O,Keren E.Encryption of pictures and shapes by random grids[J].Optics Letters,1987,12(6):377-379.
[8]Wu Xiaotian,Sun Wei.Improved tagged visual cryptography by random grids[J].Signal Processing,2014,97(7):64-82.
[9]Chen T H,Tsao K H.Visual secret sharing by random grids revisited[J].Pattern Recognition,2009,42(9):2203-2217.
[10]Yan Xuehu,Wang Shen,El-Latif A A A,et al.Visual secret sharing based on random grids with abilities of AND and XOR lossless recovery[J].Multimedia Tools&Applications,2013,74(9):3231-3252.
[11]Zhong Guanshi,Wang Jianjun.Region incrementing visual secret sharing scheme based on random grids[C]//Proc of IEEE International Symposium on Circuits and Systems.New York:IEEE Press,2013:2351-2354.
[12]Shyu S J.Image encryption by multiple random grids[J].Pattern Recognition,2009,42(7):1582-1596.