Secure Information Brokering and Sharing in Distributed Systems

To facilitate extensive collaborations, today's organizations raise increasing needs to share information through on-demand information access. Information Brokering System (IBS) is a peer-to-peer overlay network support information sharing among large collection of data sources. It consists of diverse data servers and brokering components, to locate data servers for client queries. Peer-to-peer (P2P) systems are gaining increasing popularity as a scalable means to share data among a large number of autonomous nodes. Earlier, Information Brokering Systems adopt server side access control deployment and honest assumptions on brokers. Little attention on privacy of data and metadata stored and exchanged with in the IBS. We study the privacy in Privacy-Preserving Information Brokering in Distributed Information Sharing through an innovative automaton segmentation scheme and query segment encryption and data management for processing XML data in a p2p setting. The proposed system can integrate security enforcement and query routing while preserving system-wide privacy with reasonable overhead through privacy, end-to-end performance, and scalability.