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Text watermarking for large language models (LLMs) enables model owners to verify text origin and protect intellectual property. While watermarking methods for closed-source LLMs are relatively mature, extending them to open-source models…

Cryptography and Security · Computer Science 2025-10-29 Jiaqi Xue , Yifei Zhao , Mansour Al Ghanim , Shangqian Gao , Ruimin Sun , Qian Lou , Mengxin Zheng

The indistinguishability of large language model (LLM) output from human-authored content poses significant challenges, raising concerns about potential misuse of AI-generated text and its influence on future model training. Watermarking…

Cryptography and Security · Computer Science 2026-04-16 Alexander Nemecek , Yuzhou Jiang , Erman Ayday

We study the problem of watermarking large language models (LLMs) generated text -- one of the most promising approaches for addressing the safety challenges of LLM usage. In this paper, we propose a rigorous theoretical framework to…

Computation and Language · Computer Science 2023-10-16 Xuandong Zhao , Prabhanjan Ananth , Lei Li , Yu-Xiang Wang

Large Language Models (LLMs) excel in various applications, including text generation and complex tasks. However, the misuse of LLMs raises concerns about the authenticity and ethical implications of the content they produce, such as…

Cryptography and Security · Computer Science 2024-12-02 Zesen Liu , Tianshuo Cong , Xinlei He , Qi Li

Training machine learning (ML) models is expensive in terms of computational power, amounts of labeled data and human expertise. Thus, ML models constitute intellectual property (IP) and business value for their owners. Embedding digital…

Cryptography and Security · Computer Science 2021-07-19 Sebastian Szyller , Buse Gul Atli , Samuel Marchal , N. Asokan

With the widespread adoption of open-source code language models (code LMs), intellectual property (IP) protection has become an increasingly critical concern. While current watermarking techniques have the potential to identify the code LM…

Programming Languages · Computer Science 2025-09-18 Boyu Zhang , Ping He , Tianyu Du , Xuhong Zhang , Lei Yun , Kingsum Chow , Jianwei Yin

Large language models (LLMs) have show great ability in various natural language tasks. However, there are concerns that LLMs are possible to be used improperly or even illegally. To prevent the malicious usage of LLMs, detecting…

Cryptography and Security · Computer Science 2024-04-02 Jie Ren , Han Xu , Yiding Liu , Yingqian Cui , Shuaiqiang Wang , Dawei Yin , Jiliang Tang

LLM watermarks stand out as a promising way to attribute ownership of LLM-generated text. One threat to watermark credibility comes from spoofing attacks, where an unauthorized third party forges the watermark, enabling it to falsely…

Cryptography and Security · Computer Science 2025-05-23 Thibaud Gloaguen , Nikola Jovanović , Robin Staab , Martin Vechev

Recently, numerous highly-valuable Deep Neural Networks (DNNs) have been trained using deep learning algorithms. To protect the Intellectual Property (IP) of the original owners over such DNN models, backdoor-based watermarks have been…

Cryptography and Security · Computer Science 2024-01-30 Peizhuo Lv , Hualong Ma , Kai Chen , Jiachen Zhou , Shengzhi Zhang , Ruigang Liang , Shenchen Zhu , Pan Li , Yingjun Zhang

Despite the tremendous success, deep neural networks are exposed to serious IP infringement risks. Given a target deep model, if the attacker knows its full information, it can be easily stolen by fine-tuning. Even if only its output is…

Computer Vision and Pattern Recognition · Computer Science 2021-03-09 Jie Zhang , Dongdong Chen , Jing Liao , Weiming Zhang , Huamin Feng , Gang Hua , Nenghai Yu

Text watermarking algorithms are crucial for protecting the copyright of textual content. Historically, their capabilities and application scenarios were limited. However, recent advancements in large language models (LLMs) have…

Computation and Language · Computer Science 2024-08-12 Aiwei Liu , Leyi Pan , Yijian Lu , Jingjing Li , Xuming Hu , Xi Zhang , Lijie Wen , Irwin King , Hui Xiong , Philip S. Yu

In recent years, tremendous success has been witnessed in Retrieval-Augmented Generation (RAG), widely used to enhance Large Language Models (LLMs) in domain-specific, knowledge-intensive, and privacy-sensitive tasks. However, attackers may…

Cryptography and Security · Computer Science 2025-01-10 Peizhuo Lv , Mengjie Sun , Hao Wang , Xiaofeng Wang , Shengzhi Zhang , Yuxuan Chen , Kai Chen , Limin Sun

Watermarking has recently emerged as an effective strategy for detecting the outputs of large language models (LLMs). Most existing schemes require white-box access to the model's next-token probability distribution, which is typically not…

Cryptography and Security · Computer Science 2026-02-24 Dara Bahri , John Wieting

Machine learning models are being used in an increasing number of critical applications; thus, securing their integrity and ownership is critical. Recent studies observed that adversarial training and watermarking have a conflicting…

Machine Learning · Computer Science 2024-01-09 Janvi Thakkar , Giulio Zizzo , Sergio Maffeis

The protection of cyber Intellectual Property (IP) such as web content is an increasingly critical concern. The rise of large language models (LLMs) with online retrieval capabilities enables convenient access to information but often…

Cryptography and Security · Computer Science 2025-06-09 Yisheng Zhong , Yizhu Wen , Junfeng Guo , Mehran Kafai , Heng Huang , Hanqing Guo , Zhuangdi Zhu

Safeguarding the intellectual property of machine learning models has emerged as a pressing concern in AI security. Model watermarking is a powerful technique for protecting ownership of machine learning models, yet its reliability has been…

Cryptography and Security · Computer Science 2024-09-11 Aoting Hu , Yanzhi Chen , Renjie Xie , Adrian Weller

Model watermarking utilizes internal representations to protect the ownership of large language models (LLMs). However, these features inevitably undergo complex distortions during realistic model modifications such as fine-tuning,…

Cryptography and Security · Computer Science 2026-03-20 Zikang Ding , Junhao Li , Suling Wu , Junchi Yao , Hongbo Liu , Lijie Hu

Deep learning has been achieving top performance in many tasks. Since training of a deep learning model requires a great deal of cost, we need to treat neural network models as valuable intellectual properties. One concern in such a…

Cryptography and Security · Computer Science 2019-01-21 Ryota Namba , Jun Sakuma

We present the first in depth study on the robustness of existing watermarking techniques applied to code generated by large language models (LLMs). As LLMs increasingly contribute to software development, watermarking has emerged as a…

Cryptography and Security · Computer Science 2025-08-21 Tarun Suresh , Shubham Ugare , Gagandeep Singh , Sasa Misailovic

Large language model (LLM) watermarking has shown promise in detecting AI-generated content and mitigating misuse, with prior work claiming robustness against paraphrasing and text editing. In this paper, we argue that existing evaluations…

Cryptography and Security · Computer Science 2026-05-15 Hanbo Huang , Yiran Zhang , Hao Zheng , Xuan Gong , Yihan Li , Lin Liu , Zhuotao Liu , Shiyu Liang