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Adaptive Reward-Poisoning Attacks against Reinforcement Learning

2020/03/27 by Xuezhou Zhang, Yuzhe Ma, Zhang, Xuezhou +5 · 34 citations
Biochemistry, Genetics and Molecular Biology · Computer Science · Mathematics · Medicine · Psychology · #Adversarial Robustness in Machine Learning #Artificial Intelligence (cs.AI) #Artificial intelligence #Cardiac electrophysiology and arrhythmias #Computer science #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #Machine Learning (cs.LG) #Machine Learning (stat.ML) #Psychology #Receptor Mechanisms and Signaling #Reinforcement #Reinforcement learning #cs.AI #cs.CR #cs.LG #stat.ML

paper · pdf · doi:10.48550/arxiv.2003.12613

published in arXiv (Cornell University) (Cornell University)

openalex publication_date 2020/03/27 · arxiv created 2020/06/22 · arxiv updated 2020/06/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In reward-poisoning attacks against reinforcement learning (RL), an attacker can perturb the environment reward rt into rtt at each step, with the goal of forcing the RL agent to learn a nefarious policy. We categorize such attacks by the infinity-norm constraint on δt: We provide a lower threshold below which reward-poisoning attack is infeasible and RL is certified to be safe; we provide a corresponding upper threshold above which the attack is feasible. Feasible attacks can be further categorized as non-adaptive where δt depends only on (st,at, st+1), or adaptive where δt depends further on the RL agent's learning process at time t. Non-adaptive attacks have been the focus of prior works. However, we show that under mild conditions, adaptive attacks can achieve the nefarious policy in steps polynomial in state-space size |S|, whereas non-adaptive attacks require exponential steps. We provide a constructive proof that a Fast Adaptive Attack strategy achieves the polynomial rate. Finally, we show that empirically an attacker can find effective reward-poisoning attacks using state-of-the-art deep RL techniques.

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