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Efficient storage for category-based group key management
Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology. (IDA/ADIT)ORCID iD: 0000-0002-9084-0470
2004 (English)In: Proceedings of the 5th Conference on Computer Science and Systems Engineering in Linköping, 2004, 139-146 p.Conference paper, Published paper (Refereed)
Abstract [en]

In multicast group communication, efficiency- and security are competing requirements and balancing them is an acknowledged challenge. In particular, the collusion resistance has an impact on the efficiency of any scheme. In this context, the category-based group key management (category-based GKM) scheme balances the collusion resistance constraints against the communication cost and the group controller storage. However, this scheme increases the storage requirements for users. In this paper we address this problem by introducing a novel technique based on spanning hash key tree (SKT). In the worst case, using our t echnique, the storage requirement remains the same as in the original category-based GKM scheme. However, the experimentalresults show that, in general, the SKT technique greatly reduces the key storage for the users as well as for the controller.

Place, publisher, year, edition, pages
2004. 139-146 p.
Keyword [en]
group communication, security, efficiency, tradeoffs
National Category
Computer Science
Identifiers
URN: urn:nbn:se:liu:diva-22782Local ID: 2114OAI: oai:DiVA.org:liu-22782DiVA: diva2:243095
Conference
5th Conference on Computer Science and Systems Engineering in Linköping, Norrköping, Sweden, October, 2004
Available from: 2009-10-07 Created: 2009-10-07 Last updated: 2015-02-18
In thesis
1. Security and trust mechanisms for groups in distributed services
Open this publication in new window or tab >>Security and trust mechanisms for groups in distributed services
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Group communication is a fundamental paradigm in modem distributed services, with applications in domains such as content distribution, distributed games, and collaborative workspaces. Despite the increasing interest in group-based services and the latest developments in efficient and reliable multi cast, the secure management of groups remains a major challenge for group communication.

In this thesis we propose security and trust mechanisms for supporting secure management of groups within the contexts of controlled and of self-organizing settings.

Controlled groups occur in services, such as multi cast software delivery, where an authority exists that enforces a group membership policy. In this context we propose a secure group key management approach which assures that only authorized users can access protected group resources. In order to scale to large and dynamic groups, the key management scheme must also be efficient. However, security and efficiency are competing requirements. We address this issue by proposing two flexible group key management schemes which can be configured to best meet the security and efficiency requirements of applications and services. One of the schemes can also be dynamically tuned, at system runtime, to adapt to possible requirement changes.

Self-organizing groups occur in services, such as those enabled by peer-to-peer (P2P) and wireless technologies, which adopt a decentralized architecture. In the context of self-organizing groups, with no authority to dictate and control the group members' interactions, group members might behave maliciously and attempt to subvert other members in the group. We address this problem by proposing a reputation-based trust management approach that enables group members to distinguish between well-behaving and malicious members.

We have evaluated our group key management and trust mechanisms analytically and through simulation. The evaluation of the group key management schemes shows cost advantages for rekeying and key storage. The evaluation of the reputation-based trust management shows that our trust metric is resilient to group members maliciously changing their behavior and flexible in that it supports different types of trust dynamics. As a proof of concept, we have incorporated our trust mechanism into a P2P-based intrusion detection system. The test results show an increase in system resiliency to attacks.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2005. 22 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 979
National Category
Computer Science
Identifiers
urn:nbn:se:liu:diva-30648 (URN)16243 (Local ID)91-85457-54-X (ISBN)16243 (Archive number)16243 (OAI)
Public defence
2005-11-09, Visionen, hus B, Campus Valla, Linköpings universitet, Linköping, 10:15 (English)
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2012-12-10Bibliographically approved

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Duma, ClaudiuShahmehri, NahidLambrix, Patrick

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