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Large language models (LLMs) are increasingly deployed in a wide range of applications, yet remain vulnerable to adversarial jailbreak attacks that circumvent their safety guardrails. Existing evaluation frameworks typically report binary…

Cryptography and Security · Computer Science 2026-05-14 Zvi Topol

Retrieval-augmented generation (RAG) mitigates the hallucination problem in large language models (LLMs) and has proven effective for personalized usages. However, delivering private retrieved documents directly to LLMs introduces…

Computation and Language · Computer Science 2025-11-25 Yujin Choi , Youngjoo Park , Junyoung Byun , Jaewook Lee , Jinseong Park

While safety-aligned large language models (LLMs) are increasingly used as the cornerstone for powerful systems such as multi-agent frameworks to solve complex real-world problems, they still suffer from potential adversarial queries, such…

Cryptography and Security · Computer Science 2025-01-03 Miao Yu , Junfeng Fang , Yingjie Zhou , Xing Fan , Kun Wang , Shirui Pan , Qingsong Wen

Memorization in large language models (LLMs) makes them vulnerable to data extraction attacks. While pre-training memorization has been extensively studied, fewer works have explored its impact in fine-tuning, particularly for LoRA…

Machine Learning · Computer Science 2025-06-27 Fei Wang , Baochun Li

The widespread adoption of Large Language Models (LLMs), exemplified by OpenAI's ChatGPT, brings to the forefront the imperative to defend against adversarial threats on these models. These attacks, which manipulate an LLM's output by…

Cryptography and Security · Computer Science 2025-04-04 Amelia Kawasaki , Andrew Davis , Houssam Abbas

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…

Computation and Language · Computer Science 2025-10-17 Riccardo Cantini , Alessio Orsino , Massimo Ruggiero , Domenico Talia

Large language models (LLMs) face inherent limitations in memory, including restricted context windows, long-term knowledge forgetting, redundant information accumulation, and hallucination generation. These issues severely constrain…

Artificial Intelligence · Computer Science 2026-03-20 Deliang Wen , Ke Sun

We introduce the Adversarial Confusion Attack, a new class of threats against multimodal large language models (MLLMs). Unlike jailbreaks or targeted misclassification, the goal is to induce systematic disruption that makes the model…

Computation and Language · Computer Science 2025-12-02 Jakub Hoscilowicz , Artur Janicki

The generalization capabilities of Large Language Models (LLMs) have led to their widespread deployment across various applications. However, this increased adoption has introduced several security threats, notably in the forms of…

Cryptography and Security · Computer Science 2025-08-04 Francesco Panebianco , Stefano Bonfanti , Francesco Trovò , Michele Carminati

While Large Language Model-based Multi-Agent Systems (LLM-MAS) demonstrate remarkable capabilities in solving complex tasks by orchestrating specialized agents and external tools, the implicit trust in tool outputs creates a critical attack…

Cryptography and Security · Computer Science 2026-05-26 Bingyu Yan , Xiaoming Zhang , Jinyu Hou , Chaozhuo Li , Ziyi Zhou , Yiming Hei , Litian Zhang

Current multi-task adversarial text attacks rely on abundant access to shared internal features and numerous queries, often limited to a single task type. As a result, these attacks are less effective against practical scenarios involving…

Cryptography and Security · Computer Science 2025-08-15 Wenqiang Wang , Yan Xiao , Hao Lin , Yangshijie Zhang , Xiaochun Cao

Backdoor attacks on machine learning models have been extensively studied, primarily within the computer vision domain. Originally, these attacks manipulated classifiers to generate incorrect outputs in the presence of specific, often…

Machine Learning · Computer Science 2025-03-25 Sharon Lin , Krishnamurthy , Dvijotham , Jamie Hayes , Chongyang Shi , Ilia Shumailov , Shuang Song

Large Language Models (LLMs) currently struggle to sequentially add new memories and integrate new knowledge. These limitations contrast with the human ability to continuously learn from new experiences and acquire knowledge throughout…

Computation and Language · Computer Science 2025-05-01 Xu Pan , Ely Hahami , Zechen Zhang , Haim Sompolinsky

Diffusion Language Models (DLMs) represent a promising alternative to autoregressive language models, using bidirectional masked token prediction. Yet their susceptibility to privacy leakage via Membership Inference Attacks (MIA) remains…

Machine Learning · Computer Science 2026-02-10 Yuetian Chen , Kaiyuan Zhang , Yuntao Du , Edoardo Stoppa , Charles Fleming , Ashish Kundu , Bruno Ribeiro , Ninghui Li

Large Vision-Language Models (VLMs) have achieved remarkable success in understanding complex real-world scenarios and supporting data-driven decision-making processes. However, VLMs exhibit significant vulnerability against adversarial…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Xiaosen Wang , Shaokang Wang , Zhijin Ge , Yuyang Luo , Shudong Zhang

Recent studies have widely investigated backdoor attacks on Large Language Models (LLMs) by inserting harmful question-answer (QA) pairs into their training data. However, we revisit existing attacks and identify two critical limitations:…

Computation and Language · Computer Science 2025-10-07 Jiawei Kong , Hao Fang , Xiaochen Yang , Kuofeng Gao , Bin Chen , Shu-Tao Xia , Ke Xu , Han Qiu

Despite explicit alignment efforts for large language models (LLMs), they can still be exploited to trigger unintended behaviors, a phenomenon known as "jailbreaking." Current jailbreak attack methods mainly focus on discrete prompt…

Cryptography and Security · Computer Science 2025-02-18 Guanghao Zhou , Panjia Qiu , Mingyuan Fan , Cen Chen , Mingyuan Chu , Xin Zhang , Jun Zhou

Generative large language models are crucial in natural language processing, but they are vulnerable to backdoor attacks, where subtle triggers compromise their behavior. Although backdoor attacks against LLMs are constantly emerging,…

Cryptography and Security · Computer Science 2025-02-27 Xuxu Liu , Siyuan Liang , Mengya Han , Yong Luo , Aishan Liu , Xiantao Cai , Zheng He , Dacheng Tao

The deployment of artificial intelligence (AI) in critical decision-making and evaluation processes raises concerns about inherent biases that malicious actors could exploit to distort decision outcomes. We propose a systematic method to…

Cryptography and Security · Computer Science 2024-12-23 Atsushi Yamamura , Surya Ganguli

The growing deployment of Large Vision-Language Models (VLMs) raises safety concerns, as adversaries may exploit model vulnerabilities to induce harmful outputs, with targeted black-box adversarial attacks posing a particularly severe…

Computer Vision and Pattern Recognition · Computer Science 2025-09-25 Yiming Cao , Yanjie Li , Kaisheng Liang , Bin Xiao