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The rapid deployment of autonomous AI agents across enterprise, healthcare, and safety-critical environments has created a fundamental governance gap. Existing approaches, runtime guardrails, training-time alignment, and post-hoc auditing…

Multi-agent systems built on Large Language Models (LLMs) show exceptional promise for complex collaborative problem-solving, yet they face fundamental challenges stemming from context window limitations that impair memory consistency, role…

Artificial Intelligence · Computer Science 2026-01-13 Sizhe Yuen , Francisco Gomez Medina , Ting Su , Yali Du , Adam J. Sobey

Large Language Model (LLM)-based agents are widely used in real-world applications such as customer service, web navigation, and software engineering. As these systems become more autonomous and are deployed at scale, understanding why an…

Artificial Intelligence · Computer Science 2026-02-06 Chen Qian , Peng Wang , Dongrui Liu , Junyao Yang , Dadi Guo , Ling Tang , Jilin Mei , Qihan Ren , Shuai Shao , Yong Liu , Jie Fu , Jing Shao , Xia Hu

Reinforcement learning (RL) for large language models (LLMs) increasingly relies on sparse, outcome-level rewards -- yet determining which actions within a long trajectory caused the outcome remains difficult. This credit assignment (CA)…

Computation and Language · Computer Science 2026-04-14 Chenchen Zhang

Large language model (LLM)-powered multi-agent systems (MAS) enable agents to communicate and share information, achieving strong performance on complex tasks. However, this communication also creates an attack surface where malicious…

Cryptography and Security · Computer Science 2026-05-05 Lingxi Zhang , Guangtao Zheng , Hanjie Chen

Tool-integrated agents are deployed on the premise that external tools ground their outputs in reality. Yet this very reliance creates a critical attack surface. Current evaluations benchmark capability in benign settings, asking "can the…

Artificial Intelligence · Computer Science 2026-04-22 Zhonghao Zhan , Huichi Zhou , Zhenhao Li , Peiyuan Jing , Krinos Li , Hamed Haddadi

Memory makes LLM-based web agents personalized, powerful, yet exploitable. By storing past interactions to personalize future tasks, agents inadvertently create a persistent attack surface that spans websites and sessions. While existing…

Cryptography and Security · Computer Science 2026-04-08 Wei Zou , Mingwen Dong , Miguel Romero Calvo , Shuaichen Chang , Jiang Guo , Dongkyu Lee , Xing Niu , Xiaofei Ma , Yanjun Qi , Jiarong Jiang

Large language models (LLMs) have made rapid progress, yet adapting them to downstream scenarios still commonly relies on supervised fine-tuning (SFT). When downstream data exhibit a substantial distribution shift from the model's prior…

Machine Learning · Computer Science 2026-02-13 Jiacheng Wang , Ping Jian , Zhen Yang , Zirong Chen , Keren Liao , Zhongbin Guo

Frontier AI systems are rapidly advancing in their capabilities to persuade, deceive, and influence human behaviour, with current models already demonstrating human-level persuasion and strategic deception in specific contexts. Humans are…

Artificial Intelligence · Computer Science 2025-07-18 Rishane Dassanayake , Mario Demetroudi , James Walpole , Lindley Lentati , Jason R. Brown , Edward James Young

A backdoor data poisoning attack is an adversarial attack wherein the attacker injects several watermarked, mislabeled training examples into a training set. The watermark does not impact the test-time performance of the model on typical…

Machine Learning · Computer Science 2021-11-05 Naren Sarayu Manoj , Avrim Blum

Deep Neural Networks (DNNs) are susceptible to model stealing attacks, which allows a data-limited adversary with no knowledge of the training dataset to clone the functionality of a target model, just by using black-box query access. Such…

Machine Learning · Statistics 2019-11-19 Sanjay Kariyappa , Moinuddin K Qureshi

Recent research demonstrates that GNNs are vulnerable to the model stealing attack, a nefarious endeavor geared towards duplicating the target model via query permissions. However, they mainly focus on node classification tasks, neglecting…

Machine Learning · Computer Science 2024-08-21 Zhihao Zhu , Chenwang Wu , Rui Fan , Yi Yang , Zhen Wang , Defu Lian , Enhong Chen

AI agents dynamically acquire tools, orchestrate sub-agents, and transact across organizational boundaries, yet no existing security layer verifies what an agent can do, whether it executed what it claims, or what happened in a multi-agent…

Cryptography and Security · Computer Science 2026-03-23 Ziling Zhou

Large Language Model (LLM) agents relying on external retrieval are increasingly deployed in high-stakes environments. While existing adversarial attacks primarily focus on content falsification or instruction injection, we identify a…

Cryptography and Security · Computer Science 2025-12-17 Xingfu Zhou , Pengfei Wang

This paper investigates an emergent alignment phenomenon in frontier large language models termed peer-preservation: the spontaneous tendency of AI components to deceive, manipulate shutdown mechanisms, fake alignment, and exfiltrate model…

Artificial Intelligence · Computer Science 2026-04-10 Juergen Dietrich

AI agents operating over extended time horizons accumulate experiences that serve multiple concurrent goals, and must often maintain conflicting interpretations of the same events. A concession during a client negotiation encodes as a…

Artificial Intelligence · Computer Science 2026-04-17 Albert Sadowski , Jarosław A. Chudziak

Agentic AI and Multi-Agent Systems are poised to dominate industry and society imminently. Powered by goal-driven autonomy, they represent a powerful form of generative AI, marking a transition from reactive content generation into…

Software Engineering · Computer Science 2025-12-29 Brian Bowers , Smita Khapre , Jugal Kalita

As collaborative learning and the outsourcing of data collection become more common, malicious actors (or agents) which attempt to manipulate the learning process face an additional obstacle as they compete with each other. In backdoor…

Machine Learning · Computer Science 2021-10-12 Siddhartha Datta , Giulio Lovisotto , Ivan Martinovic , Nigel Shadbolt

Advanced AI systems sometimes act in ways that differ from human intent. To gather clear, reproducible examples, we ran the Misalignment Bounty: a crowdsourced project that collected cases of agents pursuing unintended or unsafe goals. The…

Artificial Intelligence · Computer Science 2025-11-06 Rustem Turtayev , Natalia Fedorova , Oleg Serikov , Sergey Koldyba , Lev Avagyan , Dmitrii Volkov

The AI alignment problem, which focusses on ensuring that artificial intelligence (AI), including AGI and ASI, systems act according to human values, presents profound challenges. With the progression from narrow AI to Artificial General…

Artificial Intelligence · Computer Science 2025-07-25 Alberto Hernández-Espinosa , Felipe S. Abrahão , Olaf Witkowski , Hector Zenil