报告人：许静芳副教授 华中师范大学
报告题目：UMKESS: User-oriented Multi-group Key Establishments Using Secret Sharing
时 间：2017-01-03 (星期二) 10:01 ~ 11:00
地 点：旗山校区理工北楼601报告厅
主 办：数学与计算机科学学院，福建省网络安全与密码技术重点实验室
参加对象：数计学院感兴趣的教师和研究生
报告摘要：With the rapid development of group-oriented services, there are more and more multi-group communications in which users may join multiple group communications simultaneously. For example, in a Wireless Body Area Network (WBAN), medical personnels get together to hold a consultation for the patient and multiple consultation groups co-existed at the same time. A doctor may join more than one consultation groups simultaneously.Most existing group key establishment schemes establish a single group key for a single group.Applying a conventional group key establishment scheme in a straightforward manner (that is, running many 2017-01-03 (星期二) 10:01 ~ 2017-01-03 (星期二) 11:00) can provide group-key-oriented multi-group key establishments. Since most group key establishment schemes suffer from larger rekeying overheads if users depart or join the network frequently, it is obvious that these schemes are not suitable for multiple groups co-existing applications such as WBAN. In this paper, we define a new type of User-oriented Multi-group Key Establishments Using Secret Sharing (UMKESS) for secure communications in WBAN. Since health data are private and sensitive information, efficient and secure data transmission in cloud-assisted WBANs is needed. In our proposed UMKESS, each user keeps only one share and uses the share to join multiple groups simultaneously, that is, killing multiple Birds with one stone or achieve multiple things at one stroke . Furthermore, the key generation center (KGC) can manage user departing or joining dynamically with no rekeying overhead. The security strength of UMKESS is discussed in detail. In comparing to the latest group-key-oriented multi-group key establishment using secret sharing, UMKESS significantly improves the effectiveness of the multi-group communications and it is desirable for WBAN.
报告人简介：许静芳,华中师范大学计算机学院副教授、硕士生导师。2010年华中科技大学信息安全专业博士毕业并获湖北省优秀博士论文，随后在华中科技大学从事3年的博士后工作，2015年赴美国密苏里州大学堪萨斯分校访学1年。曾获第49批中国博士后科学基金和中国博士后科学基金第五批特别资助,目前主持在研国家自然科学基金1项。在Information Sciences ，IEEE Sensors Journal，Applied Mathematics and Computation，Information Processing Letters，Wireless Personal Communications等国内外期刊发表论文40余篇。
