Networked Systems Observability & Security Lab · Yangzhou University · China

Building the observability
and security foundations
for networked systems

We investigate how to see, verify, and defend networked systems, from the Internet and the web to agentic systems, with approaches ranging from eBPF-powered kernel instrumentation to runtime security enforcement.

Network Security eBPF Agent Security Runtime Observability
Networked Systems · Observability & Security
Research

Our work spans the full stack of modern networked systems, from kernel-level observability primitives to the security of the autonomous agents running on top.

Q1

How severe is the Agent DoS caused by indirect prompt injection, really?

Indirect Prompt Injection Agent DoS Black-box Detection Large-scale Measurement
Q2

Can eBPF genuinely improve the security and observability of AI agents?

eBPF Agent Observability Runtime Enforcement Kernel-level Telemetry
Research Themes
🛡️

Network Security & Vulnerability

Intrusion detection, traffic forensics, and automated vulnerability discovery, including fuzzing and zero-day hunting across networks and agents.

IDS Fuzzing Zero-day
🔭

System Observability

eBPF-based full-stack instrumentation to continuously monitor networked systems with minimal overhead, enabling kernel-to-application tracing in production.

eBPF Tracing Low Overhead
🤖

Agent Security

Runtime security, resource abuse detection, and dependability analysis for LLM-based autonomous agents, bridging OS-level enforcement and agent reasoning.

LLM Agents Runtime Security Dependability
→ Full research page: problems we are solving
Team

A small, focused group working at the intersection of systems, security, and LLMs/Agent.

Principal Investigator
Xuan Liu
Xuan Liu
Lecturer · Graduate Advisor
Ph.D., Southeast University
Observability · Security
📄
65+
Publications
CCF-A venues incl.
🔬
3
Research Lines
NetSec · Observability · Agent
👥
7
PC Member
Top-tier conferences
🏅
9
Editorial Boards
IEEE TDSC & more
View full team & openings →
Publications

Our five most recent papers. See the full list (65+).

2026
Xiang Chen, Longlong Zhu, Linying Zheng, Hongyang Du, Dong Zhang, Jianshan Zhang, Xuan Liu, Qun Huang, Dusit Niyato, Haifeng Zhou, Chunming Wu, Hongyan Liu, Kui Ren
NSDI 2026
Network MeasurementCCF APDF
When Address Learning Goes Wrong: Inducing Forwarding Loops and DoS Amplification in SDN
Dezhang Kong, Yilun Zhang, Zekun Xie, Ningpeng Zheng, Shi Lin, Zhenhua Xu, Minghao Li, Zhebo Wang, Xiang Chen, Changting Lin, Dong Zhang, Xuan Liu, Chunming Wu, Meng Han
USENIX Security 2026
SDN SecurityCCF A
LTD: Low-Overhead Topology Discovery using Programmable Data Planes
Dezhang Kong, Minghao Li, Shi Lin, Zhenhua Xu, Longlong Zhu, Linying Zheng, Xiang Chen, Changting Lin, Xuan Liu, Dong Zhang, Chunming Wu, Meng Han
IEEE INFOCOM 2026
Programmable NetworksCCF A
OmniPlan: An Adaptive Framework for Timely and Near-Optimal Network Planning Optimization
Longlong Zhu, Jiashuo Yu, Zedi Chen, Yuhan Wu, Zhifan Jiang, Yuchen Xian, Yimeng Liu, Jiajie Su, Shaopeng Zhou, Xingyuan Li, Hongyan Liu, Xuan Liu, Dong Zhang, Chunming Wu, Xiang Chen
KDD 2026
Network PlanningCCF A
MonPlan: Taming Network Measurement with Accurate and Resource-Efficient Sketch-INT Co-Design
Xiang Chen, Linying Zheng, Longlong Zhu, Zedi Chen, Qing Shu, Jialu Tian, Siqi Dong, Qun Huang, Jianshan Zhang, Xuan Liu, Haifeng Zhou, Hongyan Liu, Dong Zhang, Chunming Wu
IEEE INFOCOM 2026
Network MeasurementCCF A
View all publications →
News

Recent updates

2026-09
JOURNALOur paper RegexStealer has been accepted by IEEE TIFS.
2026-07
CONFXuan Liu was appointed as a PC member for CCS'26 Posters.
2026-06
CONFXuan Liu was appointed as a PC member for CCS'26 Demos.
2025-11
CONFXuan Liu was appointed as a member of the Student Support Committee for NDSS'26.
2025-09
EDITORIALXuan Liu was appointed as an Associate Editor for IEEE TDSC.

Join NSOS Lab

We are looking for motivated PhD / Master students and visiting researchers who are excited about the intersection of systems, security, and AI. If you want to build things that matter, we'd love to hear from you.

Get in Touch →
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