Information brokering system (IBS) shares information via on-demand access. IBS connect largescale loosely federated data sources via a brokering overlay. It is a peer-to-peer overlay network that comprises diverse data servers and brokering components, that helps client queries to locate the data server(s). Peer-to-peer (P2P) systems are gaining increasing popularity as a scalable means to share data among a large number of autonomous nodesand to balance the load. Here brokers routes the

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... ons to direct client queries to the requested data servers. The proposed novel approach is to preserve privacy of multiple stakeholders involved in the information brokering process. The system defines two privacy attacks, namely attributecorrelation attack and inference attack. The Privacy-Preserving Information Brokering in Distributed Information Sharing is achieved by an innovative automaton segmentation scheme and query segment encryption scheme.