报告人：李兴华教授 西安电子科技大学
报告题目：Spatiotemporal Correlation-Aware Dummy-Based Privacy Protection Scheme for Location-Based Services
时 间：2017年5月29日(星期一) 10:50 ~ 11:50
地 点：仓山校区成功楼601会议室
主 办：数学与计算机科学学院，软件学院，福建省网络安全与密码技术重点实验室
参加对象：计算机方向的研究生，感兴趣的教师和其他方向的研究生
报告摘要：Since the dummy-based method can provide precise query results without any requirement for a third party or key sharing, it has been widely used to protect the user’s location privacy in location-based services. However, the neighboring location sets submitted in consecutive requests always include a close spatiotemporal correlation, which enables the adversary to identify some dummies. Therefore, the existing dummy-based schemes cannot protect the user’s location privacy completely. To solve this problem, based on the dummies generated by the existing schemes, this paper filters out the dummies that can be identified by taking into account of the spatiotemporal correlation from three aspects, namely time reachability, direction similarity and in-degree/out-degree. In this way, the rest dummies can satisfy the user’s personalized privacy protection requirement. Security analysis shows that the proposed scheme successfully perturbs the spatiotemporal correlation between neighboring location sets, therefore, it is infeasible for the adversary to distinguish the user’s real location from the dummies. Furthermore, extensive experiments indicate that the proposal is able to protect the user’s location privacy effectively and efficiently.
专家简介：李兴华，男，教授，博导。于2004年和2007年在西安电子科技大学计算机系统结构和计算机应用专业分别获得工学硕士和工学博士学位。2005年在韩国国立庆北大学移动网络安全技术研究中心从事为期一年的访问学习。2011年至2012年在美国弗吉尼亚理工大学从事一年的博士后工作。目前主要从事网络及信息安全工作。
工作以来，共主持国家重点研发计划，国家自然科学基金，国家密码发展基金20余项。获得省部级一等奖3项，二等奖3项。在国内外期刊和国际会议上发表包括Infocom，IEEE TPDS等论文40余篇。获得国内外专利20余项。参与国际标准IEEE 802.11ai以及国家标准《可信计算规范第5部分：可信网络连接架构》的制定。出版专著2部/章。
