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Despite efforts to align large language models (LLMs) with societal and moral values, these models remain susceptible to jailbreak attacks -- methods designed to elicit harmful responses. Jailbreaking black-box LLMs is considered…

Computation and Language · Computer Science 2025-09-23 Muyang Zheng , Yuanzhi Yao , Changting Lin , Caihong Kai , Yanxiang Chen , Zhiquan Liu

Prompt injection attack, where an attacker injects a prompt into the original one, aiming to make an Large Language Model (LLM) follow the injected prompt to perform an attacker-chosen task, represent a critical security threat. Existing…

Cryptography and Security · Computer Science 2025-09-16 Zedian Shao , Hongbin Liu , Jaden Mu , Neil Zhenqiang Gong

Large Language Models (LLMs) have been increasingly integrated into computer-use agents, which can autonomously operate tools on a user's computer to accomplish complex tasks. However, due to the inherently unstable and unpredictable nature…

Cryptography and Security · Computer Science 2025-09-10 Haitao Hu , Peng Chen , Yanpeng Zhao , Yuqi Chen

Prompt optimization automatically refines prompting expressions, unlocking the full potential of LLMs in downstream tasks. However, current prompt optimization methods are costly to train and lack sufficient interpretability. This paper…

Computation and Language · Computer Science 2024-12-23 Yajing Wang , Zongwei Luo , Jingzhe Wang , Zhanke Zhou , Yongqiang Chen , Bo Han

We demonstrate the ability of large language models (LLMs) to perform iterative self-improvement of robot policies. An important insight of this paper is that LLMs have a built-in ability to perform (stochastic) numerical optimization and…

Large Language Model (LLM) applications are vulnerable to prompt injection and context manipulation attacks that traditional security models cannot prevent. We introduce two novel primitives--authenticated prompts and authenticated…

Cryptography and Security · Computer Science 2026-02-12 Mohan Rajagopalan , Vinay Rao

Large language model (LLM)-based computer-use agents represent a convergence of AI and OS capabilities, enabling natural language to control system- and application-level functions. However, due to LLMs' inherent uncertainty issues,…

Cryptography and Security · Computer Science 2026-01-15 Haochen Gong , Chenxiao Li , Rui Chang , Wenbo Shen

Autonomous agents based on large language models (LLMs) are rapidly emerging as a general-purpose technology, with recent systems such as OpenClaw extending their capabilities through broad tool use, third-party skills, and deeper…

Cryptography and Security · Computer Science 2026-05-15 Lukas Pirch , Micha Horlboge , Patrick Großmann , Syeda Mahnur Asif , Klim Kireev , Thorsten Holz , Konrad Rieck

Large language models (LLMs) have exhibited impressive capabilities in comprehending complex instructions. However, their blind adherence to provided instructions has led to concerns regarding risks of malicious use. Existing defence…

Artificial Intelligence · Computer Science 2023-07-25 David Glukhov , Ilia Shumailov , Yarin Gal , Nicolas Papernot , Vardan Papyan

Large language model (LLM) agents increasingly rely on external tools and retrieval systems to autonomously complete complex tasks. However, this design exposes agents to indirect prompt injection (IPI), where attacker-controlled context…

Cryptography and Security · Computer Science 2026-02-27 Tian Zhang , Yiwei Xu , Juan Wang , Keyan Guo , Xiaoyang Xu , Bowen Xiao , Quanlong Guan , Jinlin Fan , Jiawei Liu , Zhiquan Liu , Hongxin Hu

Speech Language Models (SLMs) enable natural interactions via spoken instructions, which more effectively capture user intent by detecting nuances in speech. The richer speech signal introduces new security risks compared to text-based…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-17 Amirbek Djanibekov , Nurdaulet Mukhituly , Kentaro Inui , Hanan Aldarmaki , Nils Lukas

Control applications present hard operational constraints. A violation of these can result in unsafe behavior. This paper introduces Safe Interactive Model Based Learning (SiMBL), a framework to refine an existing controller and a system…

Systems and Control · Electrical Eng. & Systems 2019-11-19 Marco Gallieri , Seyed Sina Mirrazavi Salehian , Nihat Engin Toklu , Alessio Quaglino , Jonathan Masci , Jan Koutník , Faustino Gomez

We explore a knowledge sanitization approach to mitigate the privacy concerns associated with large language models (LLMs). LLMs trained on a large corpus of Web data can memorize and potentially reveal sensitive or confidential…

Computation and Language · Computer Science 2024-03-05 Yoichi Ishibashi , Hidetoshi Shimodaira

Large language models (LLMs) and their applications, such as agents, are highly vulnerable to prompt injection attacks. State-of-the-art prompt injection detection methods have the following limitations: (1) their effectiveness degrades…

Cryptography and Security · Computer Science 2026-04-02 Yanting Wang , Wei Zou , Runpeng Geng , Jinyuan Jia

Large Language Models (LLMs) are susceptible to jailbreak attacks that can induce them to generate harmful content. Previous jailbreak methods primarily exploited the internal properties or capabilities of LLMs, such as optimization-based…

Cryptography and Security · Computer Science 2025-05-22 Jiawei Zhao , Kejiang Chen , Weiming Zhang , Nenghai Yu

The globalization of integrated circuit (IC) design and manufacturing has increased the exposure of hardware intellectual property (IP) to untrusted stages of the supply chain, raising concerns about reverse engineering, piracy, tampering,…

Instruction fine-tuning has recently emerged as a promising approach for improving the zero-shot capabilities of Large Language Models (LLMs) on new tasks. This technique has shown particular strength in improving the performance of…

Computation and Language · Computer Science 2023-07-13 Jiuding Sun , Chantal Shaib , Byron C. Wallace

Autonomous multi-agent systems are increasingly being deployed in environments where winds and ocean currents have a significant influence. Recent work has developed control policies for single agents that leverage flows to achieve their…

Systems and Control · Electrical Eng. & Systems 2025-06-05 Nicolas Hoischen , Marius Wiggert , Claire J. Tomlin

Large Language Models (LLMs) are evolving into autonomous agents capable of executing complex workflows via standardized protocols (e.g., MCP). However, this paradigm shifts control from deterministic code to probabilistic inference,…

Cryptography and Security · Computer Science 2026-02-10 Guanquan Shi , Haohua Du , Zhiqiang Wang , Xiaoyu Liang , Weiwenpei Liu , Song Bian , Zhenyu Guan

Symbol detection is a fundamental and challenging problem in modern communication systems, e.g., multiuser multiple-input multiple-output (MIMO) setting. Iterative Soft Interference Cancellation (SIC) is a state-of-the-art method for this…

Machine Learning · Computer Science 2022-08-18 Hung T. Nguyen , Steven Bottone , Kwang Taik Kim , Mung Chiang , H. Vincent Poor