LightPoW: A trust based time-constrained PoW for blockchain in internet of things

Blockchain has been widely used in the Internet of Things (IoT) to address security problems such as DDoS and Sybil. However, how to design a lightweight Proof-of-Work (PoW) for the IoT without compromising security is still a problem. To solve this problem, we propose a lightweight PoW for blockcha...

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Bibliographic Details
Published inComputer networks (Amsterdam, Netherlands : 1999) Vol. 220; p. 109480
Main Authors Qi, Liuling, Tian, Junfeng, Chai, Mengjia, Cai, Hongyun
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.2023
Subjects
Blockchain
Consensus
IoT
Lightweight
Security
Time window
Trust mechanism
Time window
Lightweight
Blockchain
Trust mechanism
Security
Consensus
IoT
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Summary:Blockchain has been widely used in the Internet of Things (IoT) to address security problems such as DDoS and Sybil. However, how to design a lightweight Proof-of-Work (PoW) for the IoT without compromising security is still a problem. To solve this problem, we propose a lightweight PoW for blockchain in IoT. Firstly, we present Heterogeneity Considered Trust Mechanism (HCTM) for IoT nodes, which evaluates the trust value according to capacity and quality, and makes the trust evaluation more reasonable. Then, we present Trust based Time-Constrained PoW (TBTC-PoW). We allocate reasonable time windows to the consensus nodes according to the computing resources, trust values and mining difficulty, which reduces the energy consumption and improves the security of PoW. Theoretical analysis and experimental results show that our method has a lower energy consumption and higher security.
ISSN:1389-1286
1872-7069
DOI:10.1016/j.comnet.2022.109480