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This work addresses the computational challenge of enforcing privacy for agentic Large Language Models (LLMs), where privacy is governed by the contextual integrity framework. Indeed, existing defenses rely on LLM-mediated checking stages…

Cryptography and Security · Computer Science 2026-01-22 Saswat Das , Ferdinando Fioretto

Modern LLM agents combine long-term memory for personalization with tool-calling interfaces for taking actions in the world -- a combination underpinning contemporary production systems. We study a previously unexamined failure of this…

Cryptography and Security · Computer Science 2026-05-26 Mahavir Dabas , Jihyun Jeong , Ming Jin , Ruoxi Jia

Jailbreak attacks on large language models (LLMs) aim to induce LLMs to produce content that they are expected to refuse. Automated black-box jailbreak generation is especially important for safety evaluation, where the attacker observes…

Cryptography and Security · Computer Science 2026-05-29 Junke Zhang , Jianwei Wang , Sishuo Chen , Yizhang He , Qingshuai Feng , Zhengyi Yang

As Large Language Models quickly become ubiquitous, it becomes critical to understand their security vulnerabilities. Recent work shows that text optimizers can produce jailbreaking prompts that bypass moderation and alignment. Drawing from…

Memory-augmented large language models extend reasoning beyond a fixed context window by maintaining long-term memory across interactions. However, existing memory systems often collapse stable user facts, episodic events, and behavioral…

Computation and Language · Computer Science 2026-05-28 Hyeonjeong Ha , Jeonghwan Kim , Cheng Qian , Jiayu Liu , William M. Campbell , Yue Wu , Yuji Zhang , Kathleen McKeown , Dilek Hakkani-Tur , Heng Ji

Large Language Models (LLMs) guardrail systems are designed to protect against prompt injection and jailbreak attacks. However, they remain vulnerable to evasion techniques. We demonstrate two approaches for bypassing LLM prompt injection…

Cryptography and Security · Computer Science 2025-07-15 William Hackett , Lewis Birch , Stefan Trawicki , Neeraj Suri , Peter Garraghan

The security of LLM-based multi-agent systems (MAS) is critically threatened by propagation vulnerability, where malicious agents can distort collective decision-making through inter-agent message interactions. While existing supervised…

Artificial Intelligence · Computer Science 2026-04-28 Rui Miao , Yixin Liu , Yili Wang , Xu Shen , Yue Tan , Yiwei Dai , Shirui Pan , Xin Wang

Long-term agent memory is increasingly multimodal, yet existing evaluations rarely test whether agents preserve the visual evidence needed for later reasoning. In prior work, many visually grounded questions can be answered using only…

Large Language Model (LLM) agents increasingly rely on long-term memory and Retrieval-Augmented Generation (RAG) to persist experiences and refine future performance. While this experience learning capability enhances agentic autonomy, it…

Cryptography and Security · Computer Science 2025-12-22 Saksham Sahai Srivastava , Haoyu He

Large Language Models (LLMs) are increasingly central to agentic systems due to their strong reasoning and planning capabilities. By interacting with external environments through predefined tools, these agents can carry out complex user…

Cryptography and Security · Computer Science 2026-03-27 Hao Li , Xiaogeng Liu , Hung-Chun Chiu , Dianqi Li , Ning Zhang , Chaowei Xiao

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

This position paper argues that securing LLM agents requires first defining an end-to-end correctness property that specifies when an agent's execution faithfully reflects the user's intent. Modern LLM agents operate over an…

Cryptography and Security · Computer Science 2026-05-19 Wenjie Qu , Ming Xu , Peiran Wang , Shengfang Zhai , Jiaheng Zhang , Dawn Song

Despite their growing adoption across domains, large language model (LLM)-powered agents face significant security risks from backdoor attacks during training and fine-tuning. These compromised agents can subsequently be manipulated to…

Cryptography and Security · Computer Science 2025-06-12 Li Changjiang , Liang Jiacheng , Cao Bochuan , Chen Jinghui , Wang Ting

Most Large Language Model (LLM) agent memory systems rely on a small set of static, hand-designed operations for extracting memory. These fixed procedures hard-code human priors about what to store and how to revise memory, making them…

Computation and Language · Computer Science 2026-05-26 Haozhen Zhang , Quanyu Long , Jianzhu Bao , Tao Feng , Weizhi Zhang , Haodong Yue , Wenya Wang

LLM-driven agents are capable of selecting external tools to complete users' tasks. However, attackers could compromise such process, steering agents toward inappropriate/wrong tools and enabling malicious actions. Most existing attacks…

Cryptography and Security · Computer Science 2026-05-27 Xuanye Zhang , Yongsen Zheng , Zhuqin Xu , Kaiyu Zhou , Bowen Shen , Haoran Ou , Tianwei Zhang , Kwok-Yan Lam

Modern agentic systems allow Large Language Model (LLM) agents to tackle complex tasks through extensive tool usage, forming structured control flows of tool selection and execution. Existing security analyses often treat these control…

Cryptography and Security · Computer Science 2026-05-12 Zhenlin Xu , Xiaogang Zhu , Yu Yao , Minhui Xue , Yiliao Song

This paper introduces a novel framework for proactive cross-domain resource orchestration in 6G RAN-Edge networks, featuring large language model (LLM)-augmented agents. The system comprises specialized RAN (energy efficiency) and Edge…

Networking and Internet Architecture · Computer Science 2025-10-01 Hatim Chergui , Miguel Catalan Cid , Pouria Sayyad Khodashenas , Daniel Camps Mur , Christos Verikoukis

Large Language Model (LLM)-powered agents demonstrate strong capabilities in autonomous task execution, tool use, and multi-step reasoning. However, their increasing autonomy also introduces a new attack surface: adversarial interactions…

Artificial Intelligence · Computer Science 2026-05-05 Sheldon Yu , Yingcheng Sun , Hanqing Guo , Julian McAuley , Qianqian Tong

Existing memory systems for embodied agents typically inject retrieved memory as static context at episode start, a paradigm we term Ahead-of-time Monolithic Memory Injection (AMMI). However, this static design quickly becomes misaligned…

Robotics · Computer Science 2026-05-15 Xin Ding , Xinrui Wang , Yifan Yang , Hao Wu , Shiqi Jiang , Qianxi Zhang , Liang Mi , Hanxin Zhu , Kun Li , Yunxin Liu , Zhibo Chen , Ting Cao

Large language model (LLM) agents are constrained by limited context windows, necessitating external memory systems for long-term information understanding. Current memory-augmented agents typically depend on pre-defined instructions and…

Computation and Language · Computer Science 2025-10-01 Yu Wang , Ryuichi Takanobu , Zhiqi Liang , Yuzhen Mao , Yuanzhe Hu , Julian McAuley , Xiaojian Wu