作者机构:[1]College of Sciences, Hohai University, Nanjing 210098,Jiangsu, China, [2]State Key Laboratory of Information Security, Institute ofSoftware, Chinese Academy of Sciences, Beijing 100190, China
相关基金:Foundation item: Supported by the National Natural Science Foundation of China (60673068), the Fundamental Research Funds for the Central Universities (2009B27414), the Natural Science Foundation of Hohai University (2084/409270)