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Author

Christian Schroeder de Witt

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Preprint Oct 2026

Can CaMeLs Talk? Securing Multi-Agent Systems Against Indirect Prompt Injection Attacks

Indirect prompt injection attacks - malicious instructions embedded in content processed by large language models - remain a major obstacle to safely deploying tool-using agents. CaMeL [Debenedetti et al., 2025] mitigates this threat for an individual agent by separating trusted control flow from untrusted data and enf...

James Peters-Gill, Avi Semler, Henning Bartsch et al. · 0 citations
Preprint Sep 2026

Epsilon-Nash Equilibria in History-Dependent SA-MDPs

We study state-adversarial Markov decision processes (SA-MDPs) as games of observation-space attacks: at each step, an agent selects an action from a received observation while an adversary$\unicode{x2014}$who knows the true state the agent is in$\unicode{x2014}$chooses a perturbed observation within a state-dependent...

Brandon Kaplowitz, Dominik Bohnet Zurcher, Akash Agrawal et al. · 0 citations
Preprint Sep 2026

ORBIT: A Framework for Multi-Agent Safety and Security Evaluations

Multi-agent LLM systems are increasingly deployed for complex, long-horizon tasks or emerge as a natural consequence of agents interacting in the wild. Yet they give rise to significant safety and security risks: the flexible protocols that enable task generalization also expose novel threats, from cascading prompt inj...

Ben Hagag, William L. Anderson, S. Chakraborty et al. · 0 citations
#machine learning Preprint Sep 2026

Entangled Representations Amplify Collateral Damage in Unlearning

A long-held intuition in interpretability research is that representational entanglement, the sharing of structure between knowledge domains in a neural network, makes unlearning harder. While the intuition is widespread, it has never been directly tested in a controlled experiment. We present a way to do so: by repurp...

Evžen Wybitul, Tim G. J. Rudner, C. D. de Witt · 0 citations

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