|Information sharing is intrinsic to collaboration in cyber space. Information is shared amongst participants in context of a collaborative mission. As the collaboration evolves participants come and go, and information is added, removed and updated. In this talk I will describe a family of group-centric information sharing models recently developed at UTSA’s Institute for Cyber Security, and discuss their application to collaborative systems. At an intuitive level we use the metaphor of a secure meeting room where participants can share information according to different policies such as a room where information is permanently recorded and accessible to new participants versus a room where only the current information is available. At a formal level these policies are characterized by temporal formulas based on the relative timings of participants and information objects joining and leaving the collaboration.|
|Ravi Sandhu Ravi Sandhu was invited to join UTSA in June 2007 as Founding Executive Director of the Institute for Cyber Security, as a condition of the State of Texas founding grant subject to approval by the Governor's office of the selected candidate. He holds the Lutcher Brown Endowed Chair in Cyber Security at UTSA with joint appointments in the Colleges of Science, Business and Engineering. An ACM and IEEE Fellow, and recipient of awards from ACM, IEEE, NIST and NSA, Ravi is a prolific and high-impact researcher, educator and entrepreneur. His role-based access control model (1996) has had immense and lasting influence on commercial practice. His Usage Control model (2004) is being widely accepted as the foundation for next-generation access control.|
|The unprecedented advances in Internet technology are revolutionizing the use and scale of distributed systems, ushering in a socio-technical environment where people interact spontaneously with each and with their environment, and share content and knowledge over a heterogeneous. Furthermore, an emerging class of cyber-physical systems, with capabilities that far exceed the autonomy, functionality, performance, and reliability of today’s systems is gradually permeating every aspect of our life. These emerging systems are realized by introducing vastly more computational intelligence into engineered systems. It is expected that CPS will transform how we interact with the physical world just as the Internet transformed how we interact with and communicate information. Enabling these complex systems requires new paradigms to advance our knowledge and ability to design these systems so that we can predict their behavior, and to accelerate our ability to understand the intricate relationship between the cyber and physical worlds so that we can exploit the potential of their deep integration. The talk will focus on complex socio-technical and cyber-physical systems and will discuss grand challenges, research trends and opportunities in advancing our knowledge about the design and engineering of these systems.|
Dr. Znati received a Ph.D. degree in Computer Science from Michigan State University in 1988, and a M.S. degree in Computer Science from Purdue University, in 1984. He is a Professor in the Department of Computer Science, with a joint appointment in Telecommunications in the Department of Information Science, and a joint appointment in Computer Engineering at the School of Engineering. He currently serves as the Director of the Computer and Network Systems Division at the National Science Foundation. Dr. Znati also served as a Senior Program Director for networking research at the National Science Foundation. In this capacity, Dr. Znati led the Information Technology Research (ITR) Initiative, a cross-directorate research program, and served as the Chair of ITR Committee.
Dr. Znati's current research interests focus on the design and analysis of evolvable, secure and resilient network architectures and protocols for wired and wireless communication networks. He is a recipient of several research grants from government agencies and from industry. He is frequently invited to present keynotes in networking and distributed conferences both in the United States and abroad.Dr. Znati served as the general chair of IEEE INFOCOM 2005, the general chair of SECON 2004, the first IEEE conference on Sensor and Ad Hoc Communications and Networks, the general chair of the Annual Simulation Symposium, and the general chair of the Communication Networks and Distributed Systems Modeling and Simulation Conference. He is a member of the Editorial Board of the International Journal of Parallel and Distributed Systems and Networks, the Pervasive and Mobile Computing Journal, the Journal on Wireless Communications and Mobile Computing, and Wireless Networks, the Journal of Mobile Communication, Computation and Information. He was also a member of the editorial board of the Journal on Ad-Hoc Networks, and a member of IEEE Transactions of Parallel and Distributed Systems.