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Security and Efficiency Tradeoffs in Multicast Group Key Management
Linköpings universitet, Institutionen för datavetenskap, IISLAB - Laboratoriet för intelligenta informationssystem. Linköpings universitet, Tekniska högskolan.
2003 (engelsk)Licentiatavhandling, monografi (Annet vitenskapelig)
Abstract [en]

An ever-increasing number of Internet applications, such as content and software distribution, distance learning, multimedia streaming, teleconferencing, and collaborative workspaces, need efficient and secure multicast communication. However, efficiency and security are competing requirements and balancing them to meet the application needs is still an open issue.

In this thesis we study the efficiency versus security requirements tradeoffs in group key management for multicast communication. The efficiency is in terms of minimizing the group rekeying cost and the key storage cost, while security is in terms of achieving backward secrecy, forward secrecy, and resistance to collusion.

We propose two new group key management schemes that balance the efficiency versus resistance to collusion. The first scheme is a flexible category-based scheme, and addresses applications where a user categorization can be done based on the user accessibility to the multicast channel. As shown by the evaluation, this scheme has a low rekeying cost and a low key storage cost for the controller, but, in certain cases, it requires a high key storage cost for the users. In an extension to the basic scheme we alleviate this latter problem.

For applications where the user categorization is not feasible, we devise a cluster-based group key management. In this scheme 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. The results of the analytical evaluation show that our scheme allows a fine-tuning of security versus efficiency requirements at runtime, which is not possible with the previous group key management schemes.

sted, utgiver, år, opplag, sider
Institutionen för datavetenskap , 2003. , s. 104
Serie
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1054
Emneord [en]
Key management, Multicast communication, Security-efficiency tradeoffs, Collusion resistance, Push-oriented approaches
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-5695ISBN: 91-7373-770-4 (tryckt)OAI: oai:DiVA.org:liu-5695DiVA, id: diva2:21459
Presentation
2003-11-13, 00:00 (engelsk)
Veileder
Merknad
Report code: LiU-TEK-LIC-2003:53.Tilgjengelig fra: 2003-12-02 Laget: 2003-12-02 Sist oppdatert: 2018-01-13

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Duma, Claudiu

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