摘要
为了减少无线物联网中数据的存储需求和传输消耗,提出一种基于有向无环图(directed acyclic graph,DAG)的局部有向无环图区块链方案(local DAG blockchain,LDB)。该方案通过使无线物联网节点只需存储本身的数据区块以及邻居节点的区块哈希值,解决了节点的存储限制与传输消耗问题,并在保证数据安全的前提下减少数据验证的过程,提升了网络的整体使用率。同时,提出一种恶意节点检测机制,有效地检测网络中的恶意节点。仿真实验中,通过与IOTA在不同网络模型中对比,比较了LDB和IOTA的存储需求、传输消耗和链路负载。实验结果表明,在网络规模为500个节点时,LDB相比IOTA在节点存储空间上减少99.8%,平均传输消耗降低66.2%,最大负载减少约28倍。
This paper proposed a local directed acyclic graph blockchain(LDB)to reduce the storage and communication requirements of blockchain,which could be applied in wireless Internet of Things(WIoT).In the proposed LDB,a WIoT node only needed to store its own generated data and hash values that derived from the data of its neighbor nodes.This enables sto-rage and transmission resourced restricted WIoT nodes to operate blockchain.The proposed LDB included a simple data verification procedure to guarantee data integrity.In particular,this paper proposed a malicious nodes detection mechanism to effectively discover data manipulation.The simulation results show that when there are 500 nodes,LDB reduces the average storage cost by 99.8%,the average transmission cost by 66.2%,and the maximum link capacity by 28 times compared with state-of-art DAG blockchains.
作者
杨昌霖
王继光
汪清
Yang Changlin;Wang Jiguang;Wang Qing(School of Computer Science,Zhongyuan University of Technology,Zhengzhou 451191,China;School of Software Engineering,Sun Yat-Sen University,Zhuhai Guangdong 519082,China;School of Electrical&Information Engineering,Tianjin University,Tianjin 300072,China)
出处
《计算机应用研究》
CSCD
北大核心
2022年第9期2597-2602,共6页
Application Research of Computers
基金
国家自然科学基金资助项目(61802454)。
关键词
局部有向无环图区块链
无线物联网
数据完整性
local directed acyclic graph blockchain
wireless Internet of Things
data integrity
