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Author

A. Abdel-Naby

3 papers indexed here

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#small language model Conference Open access Sep 2026

Region-Level Black-Box Defense Against Stealthy Embedding-Space Backdoors in CLIP

CLIPGuard is proposed, a lightweight and fully black-box defense specifically designed to mitigate embedding-space backdoors in CLIP encoders, consistently outperforming existing black-box defenses, including CleanCLIP and CleanerCLIP.

A. Abdel-Naby, Mohamed Elmahallawy · 1 citation
#artificial intelligence Preprint Sep 2026

When Clients Are Orchestrated: Strategic Gradient Manipulation to Defeat Federated Learning Servers with Efficient Defense

Federated Learning enables decentralized model training by exchanging model updates--rather than raw data--with a central parameter server (PS). While most of the existing defenses primarily assume static or independently acting adversaries, we reveal a new class of dynamically adaptive attacks that systematically bypa...

M. Shaaban, A. Abdel-Naby, Mohamed Elmahallawy · 0 citations
Preprint Sep 2026

Beyond Small Patches: Black-Box Detection and Purification of Diverse Backdoor Triggers

TRIM (Trigger Removal by Identifying Manipulated Regions), a deployment-oriented black-box defense that detects and selectively removes backdoor triggers at inference time without requiring model internals, training data, or clean samples, is proposed.

A. Abdel-Naby, Mohamed Elmahallawy · 0 citations

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