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A. Shabtai

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Preprint Sep 2026

HYDRA: Quantifying Botnet Resource Thresholds for Efficient Link-Flooding Attacks on LEO Satellite Networks

Low Earth orbit (LEO) satellite constellations, such as Starlink and Kuiper, are rapidly emerging as a critical backbone for low-latency global connectivity. As these systems expand, they become more attractive attack targets, necessitating increased resilience and security. Threat actors seek to exploit constellation-...

Roee Idan, Rami Puzis, A. Shabtai et al. · 1 citation
Jul 2026

Data Leakage Prevention in Agentic Applications via Preemptive Hardening

The resulting modifications of application code were shown to eliminate leaks when targeted by basic jailbreak and instruction-override attacks, achieving a 100% reduction in leakage, and reduce leaks by 91% under conditions of stress-induced manipulation, without the need of continuous runtime policy enforcement.

Akansha Shukla, Emily Bellov, P. Gandhi et al. · 0 citations

Training-Free Policy Violation Detection via Activation-Space Whitening in LLMs

This work proposes a training-free method that operates directly on the LLM internal representations, leveraging prior evidence that decision-relevant information is encoded within them, and derives policy-violation scores directly from normalized representations of LLM hidden activations.

Oren Rachmil, Roy Betser, Itay Gershon et al. · 5 citations · ⚡1

FAA Framework: A Large Language Model-Based Approach for Credit Card Fraud Investigations

The first Fraud Investigation Assistant (FIA) framework is introduced, which employs multimodal large language models (LLMs) to automate key steps of credit card fraud investigation and generate explanatory reports and suggests that LLM-based agents can assist with automating substantial parts of the fraud investigatio...

Shaun Shuster, Eyal Zaloof, A. Shabtai et al. · 5 citations · ⚡1
Preprint Aug 2026

Beyond the Mandate: A Systematic Security Analysis of the Agent Payments Protocol (AP2)

A systematic security analysis of AP2 v0.2 based on its roles, transaction lifecycle, deployment architectures, and trust boundaries shows that valid mandate signatures alone do not ensure that an agent-mediated transaction reflects the user's intent when its pre-authorization context is manipulated.

A. Aviv, Parth A. Gandh, Ron Bitton et al. · 0 citations
Aug 2026

Learning What to Fail On: Failure-Mode Contextual Bandits for Adversarial Data Curation

A failure-aware adversarial retrieval-augmented framework for improving robustness in natural language understanding that combines retrieval, automated validation, contextual-bandit failure selection, and controlled adversarial retraining, enables scalable robustness improvement without additional human annotation.

Roie Kazoom, Ofir Cohen, Rami Puzis et al. · 0 citations

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