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A hybrid key tree scheme for multicast to balance security and efficiency requirement
Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för datavetenskap, Databas och informationsteknik.
Linköpings universitet, Institutionen för datavetenskap, Databas och informationsteknik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Institutionen för datavetenskap, Databas och informationsteknik. Linköpings universitet, Tekniska högskolan. (IDA/ADIT)ORCID-id: 0000-0002-9084-0470
2003 (Engelska)Ingår i: Proceedings of the Twelfth IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises (WET ICE '03), Institute of Electrical and Electronics Engineers (IEEE), 2003, s. 208-213Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Security and efficiency of rekeying are crucial requirements for multicast key management. However, the two requirements pull in different directions and balancing them to meet the application needs is still an open issue. In this paper we introduce a hybrid key tree scheme to balance security, namely the resistance to collusion, and the efficiency. The resistance to collusion is measured by an integer parameter. The communication and the storage requirements for the controller depend on this parameter too, and they decrease as the resistance to collusion is relaxed. We analytically evaluate the efficiency of our scheme and compare with the previous work. The results show that our scheme allows a fine-tuning of security requirements versus efficiency requirements at run-time, which is not possible with the previous key management schemes.

Ort, förlag, år, upplaga, sidor
Institute of Electrical and Electronics Engineers (IEEE), 2003. s. 208-213
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:liu:diva-59904DOI: 10.1109/ENABL.2003.1231409ISI: 000186183900037ISBN: 0769519636 (tryckt)OAI: oai:DiVA.org:liu-59904DiVA, id: diva2:354016
Konferens
Twelfth IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises, 9-11 June, Linz, Austria, 2003
Tillgänglig från: 2010-09-29 Skapad: 2010-09-29 Senast uppdaterad: 2016-12-06Bibliografiskt granskad
Ingår i avhandling
1. Security and trust mechanisms for groups in distributed services
Öppna denna publikation i ny flik eller fönster >>Security and trust mechanisms for groups in distributed services
2005 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
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.

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2005. s. 22
Serie
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 979
Nationell ämneskategori
Datavetenskap (datalogi)
Identifikatorer
urn:nbn:se:liu:diva-30648 (URN)16243 (Lokalt ID)91-85457-54-X (ISBN)16243 (Arkivnummer)16243 (OAI)
Disputation
2005-11-09, Visionen, hus B, Campus Valla, Linköpings universitet, Linköping, 10:15 (Engelska)
Tillgänglig från: 2009-10-09 Skapad: 2009-10-09 Senast uppdaterad: 2018-01-13Bibliografiskt granskad

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