Performance Comparison of Stateful and Stateless Group Rekeying Algorithms

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Performance Comparison of Stateful and Stateless Group Rekeying Algorithms (2003)

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by Weifeng Chen , Lakshminath R. Dondeti

Venue:	In Proc. of Fourth International Workshop on Networked Group Communication, NGC
Citations:	7 - 1 self

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@INPROCEEDINGS{Chen03performancecomparison,
    author = {Weifeng Chen and Lakshminath R. Dondeti},
    title = {Performance Comparison of Stateful and Stateless Group Rekeying Algorithms},
    booktitle = {In Proc. of Fourth International Workshop on Networked Group Communication, NGC},
    year = {2003}
}

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Abstract

Scalable group rekeying schemes proposed in the literature can be classified into three categories: stateful schemes, stateless schemes and self-healing schemes. They differ mainly on the interdependency of rekey messages and messaging overhead in rekeying. Logical key hierarchy (LKH) based approaches are stateful in that members should have received past rekeying messages to decrypt current rekeying messages. Stateless rekeying algorithms, such as subset difference based member revocation (SDR) mechanism, on the other hand, use keys sent during member registration/initialization to encrypt the group key. In other words rekeying messages are independent of each other and consequently members going offline can decrypt the group key without having to consult the group manager. This is an important property considering that reliable delivery of rekey messages is a significant issue in deploying group and multicast security solutions. While in self-healing schemes, a rekeying message contains not only the current key, but also the shares of previous and future keys such that a member can recover a missed key by combining corresponding shares received by the member through other rekeying messages.

Keyphrases

stateless group rekeying algorithm performance comparison rekey message group key self-healing scheme scalable group stateless scheme stateful scheme reliable delivery group manager subset difference member registration initialization corresponding share multicast security solution use key future key current rekeying message important property consequently member past rekeying message current key logical key hierarchy member revocation significant issue rekeying message

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