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Large Language Models (LLMs) have shown significant promise in real-world decision-making tasks for embodied artificial intelligence, especially when fine-tuned to leverage their inherent common sense and reasoning abilities while being…

Cryptography and Security · Computer Science 2025-05-01 Ruochen Jiao , Shaoyuan Xie , Justin Yue , Takami Sato , Lixu Wang , Yixuan Wang , Qi Alfred Chen , Qi Zhu

Memory is a critical component in large language model (LLM)-based agents, enabling them to store and retrieve past executions to improve task performance over time. In this paper, we conduct an empirical study on how memory management…

Artificial Intelligence · Computer Science 2025-10-14 Zidi Xiong , Yuping Lin , Wenya Xie , Pengfei He , Zirui Liu , Jiliang Tang , Himabindu Lakkaraju , Zhen Xiang

Large Language Model (LLM) agents increasingly use external tools for complex tasks and rely on embedding-based retrieval to select a small top-k subset for reasoning. As these systems scale, the robustness of this retrieval stage is…

Computation and Language · Computer Science 2026-03-17 Hussein Jawad , Nicolas J-B Brunel

Autonomous web navigation agents, which translate natural language instructions into sequences of browser actions, are increasingly deployed for complex tasks across e-commerce, information retrieval, and content discovery. Due to the…

Cryptography and Security · Computer Science 2025-06-24 Atharv Singh Patlan , Ashwin Hebbar , Pramod Viswanath , Prateek Mittal

Large Language Model (LLM)-based agents employ external and internal memory systems to handle complex, goal-oriented tasks, yet this exposes them to severe extraction attacks, and effective defenses remain lacking. In this paper, we propose…

Cryptography and Security · Computer Science 2026-02-10 Yuhao Wang , Shengfang Zhai , Guanghao Jin , Yinpeng Dong , Linyi Yang , Jiaheng Zhang

As LLMs increasingly power agents that interact with external tools, tool use has become an essential mechanism for extending their capabilities. These agents typically select tools from growing databases or marketplaces to solve user…

Cryptography and Security · Computer Science 2025-10-06 Jonathan Sneh , Ruomei Yan , Jialin Yu , Philip Torr , Yarin Gal , Sunando Sengupta , Eric Sommerlade , Alasdair Paren , Adel Bibi

Large Language Model (LLM) agents have shown significant autonomous capabilities in dynamically searching and incorporating relevant tools or Model Context Protocol (MCP) servers for individual queries. However, fixed context windows limit…

Computation and Language · Computer Science 2025-07-30 Elias Lumer , Anmol Gulati , Vamse Kumar Subbiah , Pradeep Honaganahalli Basavaraju , James A. Burke

Large Language Model (LLM) Agents are an emerging computing paradigm that blends generative machine learning with tools such as code interpreters, web browsing, email, and more generally, external resources. These agent-based systems…

Cryptography and Security · Computer Science 2024-10-23 Xiaohan Fu , Shuheng Li , Zihan Wang , Yihao Liu , Rajesh K. Gupta , Taylor Berg-Kirkpatrick , Earlence Fernandes

Large Language Model (LLM) agents have become increasingly prevalent across various real-world applications. They enhance decision-making by storing private user-agent interactions in the memory module for demonstrations, introducing new…

Cryptography and Security · Computer Science 2025-06-04 Bo Wang , Weiyi He , Shenglai Zeng , Zhen Xiang , Yue Xing , Jiliang Tang , Pengfei He

Memory systems enable otherwise-stateless LLM agents to persist user information across sessions, but also introduce a new attack surface. We characterize the Trojan Hippo attack, a class of persistent memory attacks that operates in a more…

Cryptography and Security · Computer Science 2026-05-18 Debeshee Das , Julien Piet , Darya Kaviani , Luca Beurer-Kellner , Florian Tramèr , David Wagner

For LLM agents, memory management critically impacts efficiency, quality, and security. While much research focuses on retention, selective forgetting--inspired by human cognitive processes (hippocampal indexing/consolidation theory and…

Artificial Intelligence · Computer Science 2026-04-24 Yingjie Gu , Wenjian Xiong , Liqiang Wang , Pengcheng Ren , Chao Li , Xiaojing Zhang , Yijuan Guo , Qi Sun , Jingyao Ma , Shidang Shi

Large Language Models (LLMs) have empowered AI agents with advanced capabilities for understanding, reasoning, and interacting across diverse tasks. The addition of memory further enhances them by enabling continuity across interactions,…

Artificial Intelligence · Computer Science 2025-12-19 Himanshu Gharat , Himanshi Agrawal , Gourab K. Patro

LLM agents have demonstrated remarkable performance across various applications, primarily due to their advanced capabilities in reasoning, utilizing external knowledge and tools, calling APIs, and executing actions to interact with…

Machine Learning · Computer Science 2024-07-18 Zhaorun Chen , Zhen Xiang , Chaowei Xiao , Dawn Song , Bo Li

With the prosperity of large language models (LLMs), powerful LLM-based intelligent agents have been developed to provide customized services with a set of user-defined tools. State-of-the-art methods for constructing LLM agents adopt…

Computation and Language · Computer Science 2024-06-06 Yifei Wang , Dizhan Xue , Shengjie Zhang , Shengsheng Qian

Recent works have highlighted the significance of memory mechanisms in LLM-based agents, which enable them to store observed information and adapt to dynamic environments. However, evaluating their memory capabilities still remains…

Computation and Language · Computer Science 2025-06-30 Haoran Tan , Zeyu Zhang , Chen Ma , Xu Chen , Quanyu Dai , Zhenhua Dong

Recently, applications powered by Large Language Models (LLMs) have made significant strides in tackling complex tasks. By harnessing the advanced reasoning capabilities and extensive knowledge embedded in LLMs, these applications can…

Cryptography and Security · Computer Science 2025-06-13 Yuyang Zhang , Kangjie Chen , Jiaxin Gao , Ronghao Cui , Run Wang , Lina Wang , Tianwei Zhang

The lifecycle of large language models (LLMs) is far more complex than that of traditional machine learning models, involving multiple training stages, diverse data sources, and varied inference methods. While prior research on data…

Cryptography and Security · Computer Science 2025-02-21 Pengfei He , Yue Xing , Han Xu , Zhen Xiang , Jiliang Tang

Large language models (LLMs) have been shown to memorize and reproduce content from their training data, raising significant privacy concerns, especially with web-scale datasets. Existing methods for detecting memorization are primarily…

Cryptography and Security · Computer Science 2026-01-07 Zhenpeng Wu , Jian Lou , Zibin Zheng , Chuan Chen

The rapid adoption of Large Language Model (LLM) agents and multi-agent systems enables remarkable capabilities in natural language processing and generation. However, these systems introduce security vulnerabilities that extend beyond…

Cryptography and Security · Computer Science 2026-05-12 Matteo Lupinacci , Francesco Aurelio Pironti , Francesco Blefari , Francesco Romeo , Luigi Arena , Angelo Furfaro

Recently, autonomous agents built on large language models (LLMs) have experienced significant development and are being deployed in real-world applications. These agents can extend the base LLM's capabilities in multiple ways. For example,…

Cryptography and Security · Computer Science 2024-07-31 Boyang Zhang , Yicong Tan , Yun Shen , Ahmed Salem , Michael Backes , Savvas Zannettou , Yang Zhang