arXiv AI By Yuqi Jia, Hangsheng Zhang, Chenxi Liu, Junjie Liang, Xun Chen

Black-Box Red-Teaming of Multi-Agent Systems via Reinforcement Learning

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The paper introduces ReMAS, a reinforcement learning-based framework for black-box red-teaming of multi-agent systems (MAS) that fine-tunes attacker LLMs to craft adversarial prompts. ReMAS operates in two stages: a rewrite stage that refines base attack prompts to boost extraction success, and a template generation stage that builds attack templates to better invoke specific sub-agents and expose their system prompts. Experiments demonstrate that ReMAS significantly outperforms existing black-box attacks, showing high success rates and transferability across different backend LLMs and MAS structures.

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