Extended Capabilities for XOR-Based Visual Cryptography
Extended Capabilities for XOR-Based Visual Cryptography
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DOI：
10.1109/tifs.2014.2346014
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发表时间：
2014-10
影响因子：
6.8
通讯作者：
Xiaotian Wu;Wei Sun
中科院分区：
文献类型：
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作者：
Xiaotian Wu;Wei Sun
基于异或运算的视觉密码算法是解决视觉密码算法中视觉质量差而又不使背景变暗的一种可能的方法。然而，基于XOR的VC的研究是不够的。在本文中，我们开发了一些基于XOR的VC扩展功能。实际上，提出了两种基于异或的VC算法，即基于一般访问结构（GAS）的异或VC和基于自适应区域增量异或的VC。第一种算法的目标是使用GAS实现复杂的共享策略，同时保持秘密的完美重构，不需要像素扩展，不需要码本等优点。在第二种算法中，首先引入自适应安全级别的概念，其中的安全级别是根据合格集而不是堆叠的份额的数量来恢复。基于自适应区域增量XOR的VC进一步丰富了应用场景。对所提出的算法进行了理论分析，并给出了大量的实验结果和评价，证明了这两种方法的有效性和优越性。
The XOR-based visual cryptography (VC) is a possible methodology to solve the poor visual quality problem without darkening the background in VC. However, investigations on XOR-based VC are not sufficient. In this paper, we exploit some extended capabilities for XOR-based VC. Actually, two XOR-based VC algorithms are proposed, namely XOR-based VC for general access structure (GAS) and adaptive region incrementing XOR-based VC. The first algorithm aims to implement complicated sharing strategy using GAS, while maintaining merits such as perfect reconstruction of secret, no pixel expansion, and no code book requirement. In the second algorithm, the concept of adaptive security level is first introduced, where the security levels are recovered in accordance with the qualified sets instead of the quantity of stacked shares. Adaptive region incrementing XOR-based VC further enriches the application scenarios. Theoretical analysis on the proposed algorithms are provided, as well as extensive experimental results and evaluations for demonstrating the effectiveness and advantages of the two methods.