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Protecting the intellectual property of open-weight large language models (LLMs) requires verifying whether a suspect model is derived from a victim model despite common laundering operations such as fine-tuning (including PPO/DPO),…

Cryptography and Security · Computer Science 2026-04-08 Haobo Zhang , Zhenhua Xu , Junxian Li , Shangfeng Sheng , Dezhang Kong , Meng Han

The protection of Intellectual Property (IP) for Large Language Models (LLMs) has become a critical concern as model theft and unauthorized commercialization escalate. While adversarial fingerprinting offers a promising black-box solution…

Cryptography and Security · Computer Science 2026-05-28 Zhebo Wang , Zhenhua Xu , Maike Li , Wenpeng Xing , Chunqiang Hu , Chen Zhi , Meng Han

Aligning large language models (LLMs) with human preferences is crucial for enhancing their utility in terms of helpfulness, truthfulness, safety, harmlessness, and interestingness. Existing methods for achieving this alignment often…

Computation and Language · Computer Science 2024-07-04 Wenhao Liu , Xiaohua Wang , Muling Wu , Tianlong Li , Changze Lv , Zixuan Ling , Jianhao Zhu , Cenyuan Zhang , Xiaoqing Zheng , Xuanjing Huang

Large Language Models (LLMs) are widely adopted, but their high training cost leads many developers to fine-tune existing open-source models. While most adhere to open-source licenses, some falsely claim original training despite clear…

Cryptography and Security · Computer Science 2025-12-09 Suqing Wang , Ziyang Ma , Li Xinyi , Zuchao Li

Large language models (LLMs) and generative AI have played a transformative role in computer research and applications. Controversy has arisen as to whether these models output copyrighted data, which can occur if the data the models are…

Machine Learning · Computer Science 2023-08-24 Timothy Chu , Zhao Song , Chiwun Yang

Current benchmarks for Large Language Models (LLMs) primarily focus on performance metrics, often failing to capture the nuanced behavioral characteristics that differentiate them. This paper introduces a novel ``Behavioral Fingerprinting''…

Computation and Language · Computer Science 2025-09-08 Zehua Pei , Hui-Ling Zhen , Ying Zhang , Zhiyuan Yang , Xing Li , Xianzhi Yu , Mingxuan Yuan , Bei Yu

The public accessibility of large vision-language models (LVLMs) raises serious concerns about unauthorized model reuse and intellectual property infringement. Existing ownership verification methods often rely on semantically abnormal…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Yifei Zhao , Qian Lou , Mengxin Zheng

The alignment of large language models (LLMs) aims to ensure their outputs adhere to human values, ethical standards, and legal norms. Traditional alignment methods often rely on resource-intensive fine-tuning (FT), which may suffer from…

Computation and Language · Computer Science 2025-09-11 Birong Pan , Yongqi Li , Weiyu Zhang , Wenpeng Lu , Mayi Xu , Shen Zhou , Yuanyuan Zhu , Ming Zhong , Tieyun Qian

Federated learning (FL), an effective distributed machine learning framework, implements model training and meanwhile protects local data privacy. It has been applied to a broad variety of practice areas due to its great performance and…

Cryptography and Security · Computer Science 2023-03-21 Jinyin Chen , Mingjun Li , Mingjun Li , Haibin Zheng

Given the high cost of large language model (LLM) training from scratch, safeguarding LLM intellectual property (IP) has become increasingly crucial. As the standard paradigm for IP ownership verification, LLM fingerprinting thus plays a…

Cryptography and Security · Computer Science 2026-03-20 Zixun Xiong , Gaoyi Wu , Qingyang Yu , Mingyu Derek Ma , Lingfeng Yao , Miao Pan , Xiaojiang Du , Hao Wang

The widespread use of Large Language Models (LLMs) raises critical concerns regarding the unauthorized inclusion of copyrighted content in training data. Existing detection frameworks, such as DE-COP, are computationally intensive, and…

Artificial Intelligence · Computer Science 2026-03-20 David Szczecina , Senan Gaffori , Edmond Li

Despite providing superior performance, open-source large language models (LLMs) are vulnerable to abusive usage. To address this issue, recent works propose LLM fingerprinting methods to identify the specific source LLMs behind suspect…

Cryptography and Security · Computer Science 2025-05-23 Zhenzhen Ren , GuoBiao Li , Sheng Li , Zhenxing Qian , Xinpeng Zhang

The widespread deployment of large language models (LLMs) has intensified concerns around intellectual property (IP) protection, as model theft and unauthorized redistribution become increasingly feasible. To address this, model…

Computation and Language · Computer Science 2025-09-15 Zhenhua Xu , Xixiang Zhao , Xubin Yue , Shengwei Tian , Changting Lin , Meng Han

Releasing open-source large language models (LLMs) presents a dual-use risk since bad actors can easily fine-tune these models for harmful purposes. Even without the open release of weights, weight stealing and fine-tuning APIs make closed…

Growing concerns over the theft and misuse of Large Language Models (LLMs) have heightened the need for effective fingerprinting, which links a model to its original version to detect misuse. In this paper, we define five key properties for…

Cryptography and Security · Computer Science 2025-06-13 Mark Russinovich , Ahmed Salem

Fingerprinting refers to the process of identifying underlying Machine Learning (ML) models of AI Systemts, such as Large Language Models (LLMs), by analyzing their unique characteristics or patterns, much like a human fingerprint. The…

Machine Learning · Computer Science 2025-02-10 Devansh Bhardwaj , Naman Mishra

This paper presents a survey and taxonomy of LLM fingerprinting and watermarking for identity, ownership verification, provenance, and generated-content attribution. Large language models (LLMs) require substantial investments in data,…

Cryptography and Security · Computer Science 2026-05-29 Bing Liu , Shunping Wang , Yufan Zhu , Xinyi Yu , Jing Huang , Linkang Du , Hongbin Pei , Wei Luo

Addressing the intellectual property protection challenges in commercial deployment of large language models (LLMs), existing black-box fingerprinting techniques face dual challenges from incremental fine-tuning erasure and feature-space…

Cryptography and Security · Computer Science 2025-09-03 Xubin Yue , Zhenhua Xu , Wenpeng Xing , Jiahui Yu , Mohan Li , Meng Han

Large language models (LLMs) deployed as agents solve user-specified tasks over multiple steps while keeping the required manual engagement to a minimum. Crucially, such LLMs need to ground their generations in any feedback obtained to…

Computation and Language · Computer Science 2025-02-19 Jonas Gehring , Kunhao Zheng , Jade Copet , Vegard Mella , Quentin Carbonneaux , Taco Cohen , Gabriel Synnaeve

Large Language Models (LLMs) are powerful tools with profound societal impacts, yet their ability to generate responses to diverse and uncontrolled inputs leaves them vulnerable to adversarial attacks. While existing defenses often struggle…

Computation and Language · Computer Science 2025-12-30 Samuel Simko , Mrinmaya Sachan , Bernhard Schölkopf , Zhijing Jin