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Retrieval-Augmented Generation (RAG) enables large language models (LLMs) to leverage external knowledge, but also exposes valuable RAG databases to leakage attacks. As RAG systems grow more complex and LLMs exhibit stronger…

Cryptography and Security · Computer Science 2026-05-08 Maosen Zhang , Jianshuo Dong , Boting Lu , Wenyue Li , Xiaoping Zhang , Tianwei Zhang , Han Qiu

Retrieval-augmented generation (RAG) systems have become widely used for enhancing large language model capabilities, but they introduce significant security vulnerabilities through prompt injection attacks. We present a comprehensive…

Cryptography and Security · Computer Science 2025-11-21 Badrinath Ramakrishnan , Akshaya Balaji

The growing deployment of large language model (LLM) based agents that interact with external environments has created new attack surfaces for adversarial manipulation. One major threat is indirect prompt injection, where attackers embed…

Computation and Language · Computer Science 2026-04-14 Hwan Chang , Yonghyun Jun , Hwanhee Lee

Large language models (LLMs) have gained widespread adoption across diverse applications due to their impressive generative capabilities. Their plug-and-play nature enables both developers and end users to interact with these models through…

Cryptography and Security · Computer Science 2025-10-21 Zongze Li , Jiawei Guo , Haipeng Cai

LLM-integrated applications and agents are vulnerable to prompt injection attacks, where adversaries embed malicious instructions within seemingly benign input data to manipulate the LLM's intended behavior. Recent defenses based on…

Cryptography and Security · Computer Science 2025-12-09 Sarthak Choudhary , Divyam Anshumaan , Nils Palumbo , Somesh Jha

Detecting prompt injection and jailbreak attacks is critical for deploying LLM-based agents safely. As agents increasingly process untrusted data from emails, documents, tool outputs, and external APIs, robust attack detection becomes…

Machine Learning · Computer Science 2026-02-17 Max Fomin

We stress-tested 16 leading models from multiple developers in hypothetical corporate environments to identify potentially risky agentic behaviors before they cause real harm. In the scenarios, we allowed models to autonomously send emails…

Cryptography and Security · Computer Science 2025-10-17 Aengus Lynch , Benjamin Wright , Caleb Larson , Stuart J. Ritchie , Soren Mindermann , Evan Hubinger , Ethan Perez , Kevin Troy

LLM based agents are increasingly deployed in high stakes settings where they process external data sources such as emails, documents, and code repositories. This creates exposure to indirect prompt injection attacks, where adversarial…

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

As Large Language Model (LLM) agents become more capable, their coordinated use in the form of multi-agent systems is anticipated to emerge as a practical paradigm. Prior work has examined the safety and misuse risks associated with agents.…

Artificial Intelligence · Computer Science 2026-02-26 Akshat Naik , Jay Culligan , Yarin Gal , Philip Torr , Rahaf Aljundi , Alasdair Paren , Adel Bibi

A high volume of recent ML security literature focuses on attacks against aligned large language models (LLMs). These attacks may extract private information or coerce the model into producing harmful outputs. In real-world deployments,…

Machine Learning · Computer Science 2025-02-13 Ang Li , Yin Zhou , Vethavikashini Chithrra Raghuram , Tom Goldstein , Micah Goldblum

LLM-powered agents often use prompt compression to reduce inference costs, but this introduces a new security risk. Compression modules, which are optimized for efficiency rather than safety, can be manipulated by adversarial inputs,…

Cryptography and Security · Computer Science 2025-11-18 Zesen Liu , Zhixiang Zhang , Yuchong Xie , Dongdong She

The evolution of Large Language Models (LLMs) has resulted in a paradigm shift towards autonomous agents, necessitating robust security against Prompt Injection (PI) vulnerabilities where untrusted inputs hijack agent behaviors. This SoK…

Cryptography and Security · Computer Science 2026-02-12 Peiran Wang , Xinfeng Li , Chong Xiang , Jinghuai Zhang , Ying Li , Lixia Zhang , Xiaofeng Wang , Yuan Tian

Most discussions about Large Language Model (LLM) safety have focused on single-agent settings but multi-agent LLM systems now create novel adversarial risks because their behavior depends on communication between agents and decentralized…

Multiagent Systems · Computer Science 2025-10-10 Rana Muhammad Shahroz Khan , Zhen Tan , Sukwon Yun , Charles Fleming , Tianlong Chen

Backdoor attacks pose a serious threat to the secure deployment of large language models (LLMs), enabling adversaries to implant hidden behaviors triggered by specific inputs. However, existing methods often rely on manually crafted…

Cryptography and Security · Computer Science 2025-11-24 Yige Li , Zhe Li , Wei Zhao , Nay Myat Min , Hanxun Huang , Xingjun Ma , Jun Sun

Third-party skills extend LLM agents with powerful capabilities but often handle sensitive credentials in privileged environments, making leakage risks poorly understood. We present the first large-scale empirical study of this problem,…

Cryptography and Security · Computer Science 2026-04-06 Zhihao Chen , Ying Zhang , Yi Liu , Gelei Deng , Yuekang Li , Yanjun Zhang , Jianting Ning , Leo Yu Zhang , Lei Ma , Zhiqiang Li

The rapid integration of Large Language Model (LLM) agents into autonomous task execution has introduced significant privacy concerns within cross-tool data flows. In this paper, we systematically investigate and define a novel risk termed…

Software Engineering · Computer Science 2026-03-10 Yixi Lin , Jiangrong Wu , Yuhong Nan , Xueqiang Wang , Xinyuan Zhang , Zibin Zheng

Large Language Models (LLMs) are increasingly being integrated into various applications. The functionalities of recent LLMs can be flexibly modulated via natural language prompts. This renders them susceptible to targeted adversarial…

Cryptography and Security · Computer Science 2023-05-08 Kai Greshake , Sahar Abdelnabi , Shailesh Mishra , Christoph Endres , Thorsten Holz , Mario Fritz

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

Large language models (LLMs) have shown remarkable performance across a range of NLP tasks. However, their strong instruction-following capabilities and inability to distinguish instructions from data content make them vulnerable to…

Cryptography and Security · Computer Science 2025-10-07 Yulin Chen , Haoran Li , Yuexin Li , Yue Liu , Yangqiu Song , Bryan Hooi