An Efficient Distributed Group Key Management Scheme with Partial Group-Hierarchy Knowledge
Date Issued
2006
Date
2006
Author(s)
Wu, Hung-Jen
DOI
en-US
Abstract
Distributed group key management scheme (DGMS) is a new class of group key management protocols. In DGMS, there is no group controller and keys are generated by members individually. Adusumilli et al. proposed the first DGMS scheme, distributed group key distribution (DGKD). In DGKD, members play roles of sponsors to generate keys, or co-distributors to help distribute keys. Sponsors and co-distributors are re-determined when members join or leave. So every member stores a common group tree locally.
We observe two storage problems in DGKD, redundant keys and group information. This disadvantage makes storage extremely unscalable when membership changes. Based on DGKD, we propose a new DGMS scheme, EDGE. Each member stores only partial group information individually. Structure of EDGE is more flexible than the structure of DGKD without losing security. Furthermore, we prove that EDGE is more efficient than DGKD in storage and re-keying time.
Subjects
群組通訊
金鑰管理
分散式群組
group communication
group key
group information
distributed group
key management
Type
thesis
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