第 22 卷 第 4 期　 Jan. 2012

1. An Efficient Authentication Mechanism for (2, 2)-Visual Cryptography SchemeYi-Hui Chen
2. Digital Text Categorization Based on Directional Term StructuresChia-Chuan Wu and Jau-Ji Shen
3. An Improved Protocol for Password Authentication Using Smart CardsZi-Yao Cheng, Yun Liu, Chin-Chen Chang, and Shih-Chang Chang
4. A Localization Parameter Estimation Model for CKN-based Wireless Sensor NetworksYuan-Fang Chen, Ming-Chu Li, and Xue-Chao Cheng
5. A Data Hiding Scheme based on Voronoi DiagramShi-Yu Cui, Zhi-Hui Wang, Chin-Chen Chang, and Ming-Chu Li
6. Applying Personalized Tag Group Recommendation Model to Social Photo SharingTao Zhang and Guijia He