基于区块链的智慧城市边缘设备可信管理方法研究

Blockchain-based Approach for Trustworthy Management of Edge Device in Smart City

由于物联网设备的资源受限,当前智慧城市相关应用系统,在抵御以物联网设备为目标的恶意攻击时存在局限性,难以提供安全可靠的服务。本文设计了基于区块链的智慧城市边缘设备管理架构,将区块链技术引入智慧城市建设研究中,利用区块链分布式架构和去中心化的思想,实现感知数据的可信收集和存储,并基于该架构提出了一种新的基于信誉的Po W共识算法,为物联网设备提供信任机制,该算法极大的增加了由物联网设备端发起的恶意攻击的成本,有效的预防了设备的恶意攻击行为,实现了边缘设备行为的可信管理。基于所提方法实现的智慧城市应用案例验证了其可行性,有效防范了来自节点的恶意攻击,增强了系统的信息安全性。

Due to the constrained resources of edge device,currently smart city applications with centralized model are vulnerable to malicious attacks from internal,which can hardly provide high-confidence services.This paper designs a blockchain-based smart city framework,which introduces the distributed architecture and decentralization of blockchain into smart city to realize the trustworthy collection and storage of sensor data.Based on the framework,a novel credit-based PoW consensus algorithm is also proposed to provide the trustworthy mechanism for edge device.By in-creasing the cost of malicious attack,the algorithm can prevent malicious attacks launched by edge devices and implement trustworthy management of the behavior of edge device.The case study of the proposed approaches in smart city scenario shows its feasibility and effectiveness,which can effectively prevent malicious attacks from edge device and enhance the information security of the system.