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My research interests are in the general area of Computer and Network Security and Database Systems. Some of my most cited works have been in Security protocols - Fair-exchange protocols, Anonymous protocols and Voting protocols. We developed a number of interesting protocols and more are forth coming. My current research is focussed on two broad areas network survivability and pervasive computing. Within network survivability related research areas are intrusion detection, isolation and confinement and network fault tolerance. We have been able to identify some problems in the state-of-the-art in this area and working on those. My team has developed secure and survivable connection migration protocols. We are currently looking into secure process migration. Hope results will be forthcoming. The issue of trust as it relates to information system security holds considerable interest for me - particularly trust models. My students and I are working on developing formal models for trust. Pervasive computing is the second of my current focus areas. Pervasive computing is expected to create a revolution by providing services and functionalities that use knowledge about the operating environment. This knowledge is captured using different sensors that are embedded within the environment. I am particularly interested in developing data flow technology for managing and processing high speed streaming data from sensor networks. We are approaching this problem from the security perspective. The very knowledge about the environment that enables a pervasive computing application to provide better services and functionalities, can easily be exploited or misused causing security and privacy violations. My team is actively pursuing this research area. My earlier works (including my dissertation) have been in the areas of Multi-level Secure Transaction Processing Systems. I am still interested in these areas and working but has taken a back seat at this time. Other areas of interest include Computer Networks, Advanced Transaction Models and Architectures, Workflows, Distributed Database Systems and E-commerce. |