Confidentiality and integrity in distributed data exchange

摘要: The distributed exchange of structured data has emerged on the World Wide Web because it promises efficiency, easy collaboration, and—through integration diverse sources—the discovery new trends and insights. Along with these benefits, however, there is also danger that exchanged will be disclosed inappropriately or modified by unauthorized parties. This dissertation provides conceptual practical tools for ensuring confidentiality integrity across heterogeneous systems. Securing in such settings challenging participants may behave maliciously, their remote systems are outside control owner. addresses challenges, first developing a precise analysis information disclosure result from publishing relational data. critical prerequisite to forming policy permitting denying access novel notion presented here can capture leaks collusion multiple parties, prior knowledge they possess. then problems safely efficiently guaranteeing security properties To provide confidentiality, flexible fine-grained encryption framework proposed which allows owners construct, set policies, single encrypted database stored all Access granted separately disseminating keys. integrity, an efficient authentication mechanism described used detect tampering when untrusted database. Together techniques significantly advance exchange.