Coding and Cryptology : Third International Workshop, IWCC 2011, Qingdao, China, May 30-June 3, 2011. Proceedings - Yeow Meng Chee, Zhenbo Guo, San Ling, Fengjing Shao, Yuansheng Tang, Huaxiong Wang, Chaoping Xing ((Lecture Notes in Computer Science))