基于DHT和区块链技术的电网安全稳定控制终端分布式认证

Distributed Authentication of Power Grid Safety and Stability Control Terminals Based on DHT and Blockchain

电网安全稳定控制系统终端资源有限、业务实时性要求高,现有认证方案难以兼顾系统的安全性、实时性和存储效率。将分布式哈希表(distributed Hash table,DHT)技术与区块链技术相结合,提出基于跳图(skip graph)结构DHT的区块链分布式存储优化方法;设计了基于DHT和区块链技术的电网安全稳定控制终端分布式认证方案,给出了终端注册、入网和认证的流程与关键算法;分析了该方案的安全性和时空复杂度;对认证方案进行系统实现,从平均认证时延和平均终端存储开销2方面进行了实验测试,验证了该方案的可行性和在时空效率方面的优势。方案在不影响电网安全稳定控制系统终端间通信效率的同时提升了终端间通信安全性,进而保障了电网的安全稳定运行。

The power grid safety and stability control system has limited terminal resources and high requirement for real time response,and existing authentication schemes can hardly satisfy the requirements of the system for safety,real-time ability and storage efficiency.By combining the distributed Hash table(DHT)technology with the blockchain technology,a blockchain distributed storage optimization method is firstly proposed based on DHT of Skip Graph structure.And then a distributed authentication scheme of power grid safety and stability control terminals is designed based on DHT and blockchain technology,and the process and key algorithms for terminal registration,network access and authentication are given.The safety and spatial-temporal complexity of the proposed scheme are analyzed.The authentication scheme is systematically implemented,and experiments are performed on its average authentication latency and average terminal storage cost,which has verified the feasibility of the proposed scheme and its advantages in spatial-temporal efficiency.The proposed scheme improves the communication safety between terminals of the power grid safety and stability control system without affecting the communication efficiency,thus ensuring the safe and stable operation of power grid.