A VISUAL SHARING SCHEME FOR MULTIPLE SECRETS BY CAMOUFLAGING PROCESS

作者：Lin Tsung Lieh; Horng Shi Jinn^*; Lee Kai Hui; Chiu Pei Ling; Kao Tzong Wann; Run Ray Shine; Lai Jui Lin; Chen Rong Jian

来源：International Journal of Innovative Computing Information and Control, 2010, 6(12): 5749-5769.

• Visual cryptography
• Multiple-secret-sharing scheme
• Camouflaging process
• Pixel expansion

Many studies have been published related to the model of visual cryptography proposed by Naor and Shamir Most of these studies concentrate on how to share a single secret on the generated shares; although few of them focus on the sharing of multiple secrets, there are still pixel expansion and low contrast problems. By reviewing the related literatures on visual secret sharing schemes for multiple secrets (VSSM schemes), the pixel expansion is at least 2x for sharing m secrets, and the contrast is at most 1/2x. In this paper, we propose a novel VSSM scheme that is different from all previous schemes. Our approach, which is based on the secret separating and camouflaging processes, not only can generate non-expansion shares but also obtain higher contrast on recovered images without the need to redesign the codebook. Experimental results show that the proposed scheme has achieved better performance than all of the existing VSSM schemes.

• 出版日期2010-12