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Large Language Models' safety-aligned behaviors, such as refusing harmful queries, can be represented by linear directions in activation space. Previous research modeled safety behavior with a single direction, limiting mechanistic…

计算与语言 · 计算机科学 2025-05-28 Wenbo Pan , Zhichao Liu , Qiguang Chen , Xiangyang Zhou , Haining Yu , Xiaohua Jia

Safety-aligned LLMs suffer from two failure modes: jailbreak (answering harmful inputs) and over-refusal (declining benign queries). Existing vector steering methods adjust the magnitude of answer vectors, but this creates a fundamental…

机器学习 · 计算机科学 2026-05-05 Haonan Zhang , Dongxia Wang , Yi Liu , Kexin Chen , Wenhai Wang

Although Large Language Models (LLMs) have demonstrated significant capabilities in executing complex tasks in a zero-shot manner, they are susceptible to jailbreak attacks and can be manipulated to produce harmful outputs. Recently, a…

密码学与安全 · 计算机科学 2024-11-07 Zhao Xu , Fan Liu , Hao Liu

Large language models (LLMs) remain vulnerable to jailbreak prompts that are fluent and semantically coherent, and therefore difficult to detect with standard heuristics. A particularly challenging failure mode occurs when an attacker tries…

人工智能 · 计算机科学 2026-02-24 Amirhossein Farzam , Majid Behabahani , Mani Malek , Yuriy Nevmyvaka , Guillermo Sapiro

The growing integration of Large Language Models (LLMs) into critical societal domains has raised concerns about embedded biases that can perpetuate stereotypes and undermine fairness. Such biases may stem from historical inequalities in…

计算与语言 · 计算机科学 2025-10-17 Riccardo Cantini , Alessio Orsino , Massimo Ruggiero , Domenico Talia

The evolution of generative models from next-token predictors to autonomous engines of complex systems necessitates rigorous safety hardening. Adversarial jailbreaking, the strategic manipulation of models to elicit harmful output, remains…

机器学习 · 计算机科学 2026-05-11 Montaser Mohammedalamen , Kevin Roice , Reginald McLean , Alyssa Lefaivre Škopac

Large Language Models face security threats from jailbreak attacks. Existing research has predominantly focused on prompt-level attacks while largely ignoring the underexplored attack surface of user-controlled response prefilling. This…

密码学与安全 · 计算机科学 2025-08-27 Yakai Li , Jiekang Hu , Weiduan Sang , Luping Ma , Dongsheng Nie , Weijuan Zhang , Aimin Yu , Yi Su , Qingjia Huang , Qihang Zhou

As deep learning advances, Large Language Models (LLMs) and their multimodal counterparts, Multimodal Large Language Models (MLLMs), have shown exceptional performance in many real-world tasks. However, MLLMs face significant security…

密码学与安全 · 计算机科学 2024-10-23 Fenghua Weng , Yue Xu , Chengyan Fu , Wenjie Wang

Large language models (LLMs) generate human-aligned content under certain safety constraints. However, the current known technique ``jailbreak prompt'' can circumvent safety-aligned measures and induce LLMs to output malicious content.…

密码学与安全 · 计算机科学 2025-08-28 Xi Wang , Songlei Jian , Shasha Li , Xiaopeng Li , Bin Ji , Jun Ma , Xiaodong Liu , Jing Wang , Feilong Bao , Jianfeng Zhang , Baosheng Wang , Jie Yu

As large language models (LLMs) become integrated into everyday applications, ensuring their robustness and security is increasingly critical. In particular, LLMs can be manipulated into unsafe behaviour by prompts known as jailbreaks. The…

With the rapid advancement of Large Language Models (LLMs), the safety of LLMs has been a critical concern requiring precise assessment. Current benchmarks primarily concentrate on single-turn dialogues or a single jailbreak attack method…

Jailbreak vulnerabilities in Large Language Models (LLMs) refer to methods that extract malicious content from the model by carefully crafting prompts or suffixes, which has garnered significant attention from the research community.…

密码学与安全 · 计算机科学 2024-09-13 Lijia Lv , Weigang Zhang , Xuehai Tang , Jie Wen , Feng Liu , Jizhong Han , Songlin Hu

Despite extensive safety alignment, Large Language Models (LLMs) often fail against jailbreak attacks. While machine unlearning has emerged as a promising defense by erasing specific harmful parameters, current methods remain vulnerable to…

密码学与安全 · 计算机科学 2026-01-07 Xi Wang , Songlei Jian , Shasha Li , Xiaopeng Li , Zhaoye Li , Bin Ji , Baosheng Wang , Jie Yu

Large language models (LLMs) are trained on a deluge of text data with limited quality control. As a result, LLMs can exhibit unintended or even harmful behaviours, such as leaking information, fake news or hate speech. Countermeasures,…

机器学习 · 计算机科学 2024-08-05 Jingtong Su , Julia Kempe , Karen Ullrich

Jailbreaking is an emerging adversarial attack that bypasses the safety alignment deployed in off-the-shelf large language models (LLMs). A considerable amount of research exists proposing more effective jailbreak attacks, including the…

密码学与安全 · 计算机科学 2024-03-05 Daoyuan Wu , Shuai Wang , Yang Liu , Ning Liu

Detecting jailbreak behaviour in large language models remains challenging, particularly when strongly aligned models produce harmful outputs only rarely. In this work, we present an empirical study of output based jailbreak detection under…

计算与语言 · 计算机科学 2026-04-22 Hanrui Luo , Shreyank N Gowda

In recent years, the security vulnerabilities of Multi-modal Large Language Models (MLLMs) have become a serious concern in the Generative Artificial Intelligence (GenAI) research. These highly intelligent models, capable of performing…

密码学与安全 · 计算机科学 2026-01-12 Badhan Chandra Das , Md Tasnim Jawad , Joaquin Molto , M. Hadi Amini , Yanzhao Wu

With the rapid advancement of large language models (LLMs), ensuring their safe use becomes increasingly critical. Fine-tuning is a widely used method for adapting models to downstream tasks, yet it is vulnerable to jailbreak attacks.…

密码学与安全 · 计算机科学 2025-10-10 Xiangfang Li , Yu Wang , Bo Li

Despite advances in improving large language model (LLM) to refuse to answer malicious instructions, widely used LLMs remain vulnerable to jailbreak attacks where attackers generate instructions with distributions differing from safety…

计算与语言 · 计算机科学 2025-09-05 Sheng Liu , Qiang Sheng , Danding Wang , Yang Li , Guang Yang , Juan Cao

Despite extensive alignment efforts, Large Vision-Language Models (LVLMs) remain vulnerable to jailbreak attacks, posing serious safety risks. To address this, existing detection methods either learn attack-specific parameters, which…

计算机视觉与模式识别 · 计算机科学 2025-10-21 Shuang Liang , Zhihao Xu , Jialing Tao , Hui Xue , Xiting Wang