Automaton segmentation: a new approach to preserve privacy in xml information brokering

A Distributed Information Brokering System (DIBS) is a peer-to-peer overlay network that comprises diverse data servers and brokering components helping client queries locate the data server(s). Many existing information brokering systems adopt server side access control deployment and honest assumptions on brokers. However, little attention has been drawn on privacy of data and metadata stored and exchanged within DIBS. In this paper, we address privacypreserving information sharing via on-demand information access. We propose a flexible and scalable system using a broker-coordinator overlay network. Through an innovative automaton segmentation scheme, distributed access control enforcement, and query segment encryption, our system integrates security enforcement and query forwarding while preserving system-wide privacy. We present the automaton segmentation approach, analyze privacy preservation in details, and finally examine the end-to-end performance and scalability through exp...

• Type: Conference
• Year: 2007
• Where: CCS
• Authors: Fengjun Li, Bo Luo, Peng Liu, Dongwon Lee, Chao-Hsien Chu
• Keywords: Access Control, CCS 2007, Information Brokering Systems, Overlay Network, Security Privacy