- Universität Zürich > Wirtschaftswissenschaftliche Fakultät > Informatik, Institut für > Prof. Dr. Klaus Dittrich (verstorben)
- Sturm
Completed Research Project
- Title / Titel
- Access Control in Peer Data Management Systems
- Summary / Zusammenfassung
- The project will extend the Peer-to-Peer (P2P) data sharing paradigm with access control mechanisms which enable secure data sharing.
The P2P approach to data management, where a peer can be a server and a client at the same time, is on the rise. Because P2P networks offer flexibility, robustness against blackouts and good scaling, they are used to distribute all kinds of data and information.
The use of P2P networks introduces new challenges for database management systems. These new databases, called Peer Data Management Systems (PDMS), are Peer-to-Peer networks where every contributing peer has its own database management system and intends to share parts of its database with other peers. To share data, the peers of the PDMS need to establish data mappings between their schemes. Query processing inside the PDMS is done by traversing these mappings, rewriting the queries, executing them on the peers and gathering the results at the peer that requested data. Because every peer can leave and join the network at its will, there is no permanent global schema. In fact, a kind of global schema is only established during query execution.
Many security problems arise in such an environment, however, there is no agreed approach which considers the creation of an access control mechanism in the special case of PDMS. Without access control in the PDMS, every user can see all data. This is inappropriate in situations where private data should be exchanged. As a result, we need a fine grained PDMS access control, similar to what is common in relational databases.
To accomplish this, several already established security mechanisms for P2P networks need to be combined to form a full PDMS access control component. The component will be based on access control information contained in the local peer databases. This information is considered to be a kind of meta data that can be connected through access control mappings. Such a mapping is a kind of contract between the contractual peers. Thus, even private data can be shared securely between these peers.
- Publications / Publikationen
- Christoph Sturm and Klaus R. Dittrich and Patrick Ziegler: An Access Control Mechanism for P2P Collaborations, DaMaP '08: Proceedings of the 2008 international workshop on Data management in peer-to-peer systems, New York, NY, USA, 2008Christoph Sturm: Orchestrating Access Control in Peer Data Management Systems. Accepted paper on the EDBT Ph.D. Workshop 2006, Munich, Germany, March 26.
- Keywords / Suchbegriffe
- Peer-to-Peer, PDMS, Access Control
- Project Leadership and Contacts /
Projektleitung und Kontakte Christoph Sturm (Project Leader) sturm^^at**ifi.uzh.ch
- Funding Source(s) /
Unterstützt durch - Universität Zürich (position pursuing an academic career)
- Duration of Project / Projektdauer
- Mar 2004 to Mar 2010