电工技术学报2026，Vol.41Issue(13)：4469-4488,20.DOI:10.19595/j.cnki.1000-6753.tces.260847
基于往返延时一致性测量的远程有线多跳网络密钥协商机制
Round-Trip Delay Consistency Measurement Based Key Agreement for Remote Wired Multi-Hop Networks
祁学豪 1刘溪禹 2宋宇波 3唐旭升 1姚启桂4
作者信息
- 1. 东南大学网络空间安全学院 南京 210096||紫金山实验室 南京 210096
- 2. 东南大学网络空间安全学院 南京 210096
- 3. 东南大学网络空间安全学院 南京 210096||紫金山实验室 南京 210096||新疆战略性矿产资源绿色智能开发与高效利用兵团重点实验室大数据与信息工程学院新疆工业学院 和田 848000
- 4. 中国电力科学研究院有限公司 南京 210003
- 折叠
摘要
Abstract
Conventional key agreement schemes rely on computational hardness assumptions and are vulnerable to future quantum attacks,while wireless physical-layer methods based on channel reciprocity suffer from distance sensitivity and poor adaptability to multi-hop topologies.To address these issues,this paper proposes a remote key agreement mechanism for wired multi-hop networks that exploits the consistency of network-layer round-trip time(RTT)as a candidate entropy source.The legitimate endpoints perform active probing using Internet Control Message Protocol(ICMP)Echo requests and replies,record bidirectional RTT sequences,and extract frequency-domain magnitude spectra of delay jitter to characterize the path response.After weighted moving average(WMA)preprocessing,cumulative distribution function(CDF)-based quantization generates initial bit sequences,followed by Cascade information reconciliation and 2-universal hashing privacy amplification to produce a final consistent key.Experiments on a cross-regional cloud testbed show that the average initial key agreement rate reaches 72.33%,and after reconciliation the final consistency is 100%.The generated keys pass the National Institute of Standards and Technology(NIST)randomness tests,with an average generation rate of about 500 bit/s.Furthermore,path-internal eavesdropping experiments demonstrate that an adversary observing only local link delays achieves bit agreement rates close to random guessing(≤54.4%),confirming the structural asymmetry of bidirectional RTT measurements.A quantitative information-theoretic analysis shows that the scheme can extract about 834 bits of secure key under typical parameters.This work extends the entropy source of unconditionally secure key generation from physical-layer wireless features to network-layer delay characteristics,offering a practical solution for remote terminal key establishment in power communication networks and similar infrastructure scenarios without relying on public-key infrastructure.关键词
密钥协商/延时测量/有线信道/远程设备/互易性Key words
Key agreement/delay measurement/wired channel/remote devices/reciprocity分类
信息技术与安全科学引用本文复制引用
祁学豪,刘溪禹,宋宇波,唐旭升,姚启桂..基于往返延时一致性测量的远程有线多跳网络密钥协商机制[J].电工技术学报,2026,41(13):4469-4488,20.
