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

【Author】 Qi, Liuling; Tian, Junfeng; Chai, Mengjia; Cai, Hongyun

【Source】COMPUTER NETWORKS

【影响因子】5.493

【Abstract】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 con-sumption and higher security.

【Keywords】Blockchain; IoT; Consensus; Lightweight; Security; Trust mechanism; Time window

【发表时间】2023 JAN

【收录时间】2023-07-09

【文献类型】理论模型

【主题类别】

区块链技术-协同技术-物联网