Author

Zhaoyang Zhang

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Preprint Aug 2026

When Time Meets Space: Entropy Integration and Dynamic Threshold for Adaptive DDoS Detection in SDN

Entropy-based Distributed Denial of Service (DDoS) detection in Software-Defined Networking (SDN) commonly relies on spatial traffic distributions and static or loosely adaptive thresholds, making it vulnerable to legitimate traffic fluctuations in Internet of Things (IoT) environments. This paper proposes a lightweigh...

Zhaoyang Zhang, Shen Wang, Ahmad F. Taha et al. · 1 citation · ⚡1

Preprint Aug 2026

Cross-Domain Joint DDoS Detection in Multi-Controller SDN via Confidence-Based Entropy Fusion

A cross-domain confidence-fusion framework that leverages lightweight edge-side messages to calibrate aggregation-controller decisions without sharing raw traffic data is proposed that is non-intrusive, communication-efficient, and incrementally deployable.

Zhaoyang Zhang, Shen Wang, Xiao-Feng Tao · 0 citations

Jul 2026

Do Speech Tokens Leak Voiceprints? Speaker Inversion Attacks Against End-to-End Speech Language Models

This work introduces Audio BERT (AuB), a trainable model that constructs token embeddings from discrete codebooks and aggregates them into speaker-sensitive representations, and proposes SpInv, a two-stage inversion method built on AuB to recover embeddings in the space of an attacker-specified speaker encoder.

Ye Lu, Yi-Han Yan, Zhaoyang Zhang et al. · arXiv.org · 0 citations