Applications and Techniques in Information Security 6th International Conference, ATIS 2015, Beijing, China, November 4-6, 2015, Proceedings - Niu, Wenjia; Li, Gang; Liu, Jiqiang; Tan, Jianlong; Guo, Li; Han, Zhen; Batten, Lynn (Springer Berlin Heidelberg : Imprint: Springer, 2015)