复杂物联网联盟链系统通信机制研究EI北大核心CSCD

联盟链具有公有链固有的安全性,其许可准入机制允许对网络结点及规模进行控制,恰好迎合了物联网(Internet of things,IoT)向规模化、智能化发展的需要,成为物联网学术界研究的热点.然而,联盟链在一定程度上违背了区块链去中心化价值和信任体系,产生了多中心化的复杂区块链生态体系,为使物联网数字资产在不同联盟链间安全、自主、动态流转,迫切需要对涉及多个联盟链的复杂系统通信机制进行研究.基于存在多个特权子群的门限数字签名机制建立多联盟链链间合作共识,利用授权码构造身份证明,实现链间实体自主授权过程;构建跨联盟链交易原子提交协议,确保异步授权状态同步;提出多级混合可选信任—验证交易共识机制.实验表明,上述机制能够在优化系统性能的同时确保系统的安全性.

Communication Mechanism of IoT Consortium Chain in Complex Scenarios

Consortium chain has the inherent security of public chain, and its permission and access mechanism allows institutions to control network nodes and scale, which exactly meets the need of scale and intelligent development of internet of things (IoT), and has become a hotspot in the research of the internet of things. However, the consortium chain violates the decentralized blockchain to some extent, resulting in multi-centralized complex consortium chain ecosystem. In order to make the digital assets of the internet of things safe, autonomous and dynamic transfer between different consortium chains, it is urgent to research on the communication mechanism of IoT consortium chain in complex scenarios. In this paper a method for establishing cooperation consensus among multiple consortium chains based on the threshold digital signature mechanism is proposed. On this basis, a multi-layer hybrid optional trust-verified transaction consensus mechanism is proposed. Then, the authorization code is used to construct an identity certificate, thereby the autonomous authorization between entities is realized. After that, the cross-consortium chain transaction atomic submission protocol is constructed to ensure that the asynchronous authorization status is synchronized, as well as multiple mixed optional trust-verification transaction consensus mechanism is proposed. Experimental results show that the above mechanism optimizes system performance while ensuring system security a lot.