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Study of Proxy Re-cryptography in Group Key Management for Group Communications System

机译：群通信系统群密钥管理中的代理重加密技术研究

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摘要

This paper presents a group key management mechanism PTGKM based on hierarchical and domain structure in Near-Space Network. The mechanism combines hierarchical and domain structure with the use of proxy re-cryptography algorithms. It has the following characteristics: (1) the core backbone network node cannot obtain the new group key. It only participates in the distribution of the new group key. So the mechanism solves the problem of a single point of failure of group key management based on hierarchical and domain structure; (2) The mechanism restricts the impact of group membership change in its domain, which improves the scalability of group key management scheme; (3) The inter-domain switching algorithm effectively reduces the rekeying overhead of the high mobile nodes' frequent switching between different domains; (4) The mechanism adapts to the characteristics of Near-Space Network and meets the forward security and backward security. The analysis results show that, PTGKM mechanism is applicable to near space environment and has good scalability and reliability.
机译：本文提出了一种基于层级和域结构的近空间网络中的组密钥管理机制PTGKM。该机制通过使用代理重新加密算法将层次结构和域结构结合在一起。它具有以下特点：（1）核心骨干网节点无法获取新的组密钥。它仅参与新组密钥的分发。因此，该机制解决了基于层次结构和域结构的组密钥管理单点故障的问题。 （2）该机制限制了组成员身份更改在其域中的影响，从而提高了组密钥管理方案的可伸缩性; （3）域间切换算法有效地减少了高移动节点在不同域之间频繁切换的密钥更新开销; （4）该机制适应近空间网络的特点，满足前向安全性和后向安全性。分析结果表明，PTGKM机制适用于近空间环境，具有良好的可扩展性和可靠性。

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