Teegraph: A Blockchain consensus algorithm based on TEE and DAG for data sharing in IoT

Blockchain offers new ways to the data sharing-based collaboration among IoT devices when a centralized IT infrastructure is unavailable. As one of the critical elements in a Blockchain system, the existing consensus algorithms still have some weaknesses, such as energy-wasting, low throughput, high...

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Bibliographic Details
Published inJournal of systems architecture Vol. 122; p. 102344
Main Authors Fu, Xiang, Wang, Huaimin, Shi, Peichang, Zhang, Xunhui
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2022
Subjects
Blockchain
Consensus algorithm
DAG
Data sharing
IoT
TEE
DAG
Data sharing
TEE
Blockchain
Consensus algorithm
IoT
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Summary:Blockchain offers new ways to the data sharing-based collaboration among IoT devices when a centralized IT infrastructure is unavailable. As one of the critical elements in a Blockchain system, the existing consensus algorithms still have some weaknesses, such as energy-wasting, low throughput, high latency, and increased network communication requirements. In this paper, we focus on designing a highly efficient Blockchain consensus algorithm for data sharing among IoT devices. We present the detailed design of Teegraph, which is a Trusted Execution Environment (TEE) and Directed Acyclic Graph (DAG)-based consensus algorithm. A proof-of-concept implementation of Teegraph is presented. The simulation results demonstrate that TEE usage in Teegraph is more efficient than that of the existing state of the art TEE-based consensus algorithms such as MinBFT and MinZyzzyva. Moreover, Teegraph outperforms Hashgraph, one of the most popular DAG-based consensus algorithms in throughput and latency.
ISSN:1383-7621
1873-6165
DOI:10.1016/j.sysarc.2021.102344