Group key agreement protocol permits a set of users to create a common key to make sure security of information exchange among members of the group. It is extensively used in secure multiparty computation, resource security sharing, and distributed collaborative computing etc. For large wireless ad-hoc network, there is no authentication center, the computing power and communication distance of terminals are constrained, and nodes frequently join and exit the network. For these reasons, Group Key Management for securing multicast communications in an energy-constrained large wireless ad-hoc network environment is still remains a critical and challenging issue. In this direction, we propose a cluster-based hybrid hierarchical-group key agreement (CHH-GKA) framework to provide a scalable solution for Secure Group Communication (SGC) in large wireless ad hoc networks (WANETs). This technique is based on splitting a large group into a certain number of clusters in which the last member of each of the clusters is designated as a cluster head (CH) and the last member of the group is designated as the group controller (GC). First we apply on hand Naresh–Murthy-group key agreement (NM-GKA) protocol locally in every cluster in parallel in level-I to generate CKs and then in level-II, the CHs’ use these CKs and implement NM-GKA protocol again among them to form the complete group key. Finally each CH distributes the group key to all its members through their respective CK encrypted links. In this process, first we survey several cluster-based hierarchical GKA protocols and compare the proposed one with them and show that it provides optimal performance with regard to computation and communication expenses. Further, it also handles dynamic events and is provably secure in formal security model under the cryptographic suppositions.

中文翻译：

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适用于大型无线ad hoc网络的可证明基于安全性的基于群集的混合层次组密钥协议

组密钥协议协议允许一组用户创建一个公共密钥，以确保组成员之间信息交换的安全性。它广泛用于安全的多方计算，资源安全共享和分布式协作计算等中。对于大型无线自组织网络，没有身份验证中心，终端的计算能力和通信距离受到限制，节点频繁加入和退出网络。由于这些原因，用于在能量受限的大型无线自组织网络环境中保护多播通信的组密钥管理仍然是一个关键且具有挑战性的问题。在这个方向上，我们提出了一种基于群集的混合层次结构组密钥协议（CHH-GKA）框架，以为大型无线ad hoc网络（WANET）中的安全组通信（SGC）提供可扩展的解决方案。该技术基于将大型组划分为一定数量的群集，其中每个群集的最后一个成员被指定为群集头（CH），而该组的最后一个成员被指定为组控制器（GC） 。首先，我们在第一层并行地在每个群集中局部应用本地的Naresh-Murthy-group密钥协议（NM-GKA）协议，以生成CK，然后在第二层中，CH使用这些CK并实现NM-GKA协议再次在其中形成完整的组密钥。最后，每个CH通过其各自的CK加密链接将组密钥分发给其所有成员。在这个过程中 首先，我们调查了几种基于群集的分层GKA协议，并将所提出的协议与它们进行比较，结果表明，该协议在计算和通信费用方面提供了最佳性能。此外，它还处理动态事件，并且在密码学假设下，在正式的安全模型中可证明是安全的。