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The evolution of Large Language Models (LLMs) into agentic systems that perform autonomous reasoning and tool use has created significant intellectual property (IP) value. We demonstrate that these systems are highly vulnerable to imitation…

Artificial Intelligence · Computer Science 2026-02-10 Liwen Wang , Zongjie Li , Yuchong Xie , Shuai Wang , Dongdong She , Wei Wang , Juergen Rahmel

Reasoning Large Language Models (RLLMs) excelling in complex tasks present unique challenges for digital watermarking, as existing methods often disrupt logical coherence or incur high computational costs. Token-based watermarking…

Artificial Intelligence · Computer Science 2026-04-02 Shuliang Liu , Xingyu Li , Hongyi Liu , Dong Fang , Yibo Yan , Bingchen Duan , Qi Zheng , Lingfeng Su , Xuming Hu

Potential harms of Large Language Models such as mass misinformation and plagiarism can be partially mitigated if there exists a reliable way to detect machine generated text. In this paper, we propose a new watermarking method to detect…

Computation and Language · Computer Science 2023-12-12 Kaan Efe Keleş , Ömer Kaan Gürbüz , Mucahid Kutlu

The promise of LLM watermarking rests on a core assumption that a specific watermark proves authorship by a specific model. We demonstrate that this assumption is dangerously flawed. We introduce the threat of watermark spoofing, a…

Cryptography and Security · Computer Science 2026-02-24 Hyeseon An , Shinwoo Park , Suyeon Woo , Yo-Sub Han

Copyright protection for large language models is of critical importance, given their substantial development costs, proprietary value, and potential for misuse. Existing surveys have predominantly focused on techniques for tracing…

Cryptography and Security · Computer Science 2026-04-08 Zhenhua Xu , Xubin Yue , Zhebo Wang , Haobo Zhang , Qichen Liu , Xixiang Zhao , Jingxuan Zhang , Wenjun Zeng , Wengpeng Xing , Dezhang Kong , Changting Lin , Meng Han

The capabilities of large language models have grown significantly in recent years and so too have concerns about their misuse. It is important to be able to distinguish machine-generated text from human-authored content. Prior works have…

Cryptography and Security · Computer Science 2024-10-15 Julien Piet , Chawin Sitawarin , Vivian Fang , Norman Mu , David Wagner

In recent years, LLM watermarking has emerged as an attractive safeguard against AI-generated content, with promising applications in many real-world domains. However, there are growing concerns that the current LLM watermarking schemes are…

Cryptography and Security · Computer Science 2025-06-13 Shayleen Reynolds , Hengzhi He , Dung Daniel T. Ngo , Saheed Obitayo , Niccolò Dalmasso , Guang Cheng , Vamsi K. Potluru , Manuela Veloso

Large Language Models (LLMs) store an extensive amount of factual knowledge obtained from vast collections of text. To effectively utilize these models for downstream tasks, it is crucial to have reliable methods for measuring their…

Computation and Language · Computer Science 2023-06-13 Pouya Pezeshkpour

Large language model (LLM) watermarks enable authentication of text provenance, curb misuse of machine-generated text, and promote trust in AI systems. Current watermarks operate by changing the next-token predictions output by an LLM. The…

Cryptography and Security · Computer Science 2025-12-03 Dor Tsur , Carol Xuan Long , Claudio Mayrink Verdun , Hsiang Hsu , Chen-Fu Chen , Haim Permuter , Sajani Vithana , Flavio P. Calmon

Watermarking the outputs of large language models (LLMs) is critical for provenance tracing, content regulation, and model accountability. Existing approaches often rely on access to model internals or are constrained by static rules and…

Machine Learning · Computer Science 2025-06-23 Agnibh Dasgupta , Abdullah Tanvir , Xin Zhong

Digital watermarking is a promising solution for mitigating some of the risks arising from the misuse of automatically generated text. These approaches either embed non-specific watermarks to allow for the detection of any text generated by…

Cryptography and Security · Computer Science 2025-06-23 Zihao Fu , Chris Russell

Detecting whether copyright holders' works were used in LLM pretraining is poised to be an important problem. This work proposes using data watermarks to enable principled detection with only black-box model access, provided that the…

Cryptography and Security · Computer Science 2024-08-20 Johnny Tian-Zheng Wei , Ryan Yixiang Wang , Robin Jia

As the knowledge of large language models (LLMs) becomes outdated over time, there is a growing need for efficient methods to update them, especially when injecting proprietary information. Our study reveals that comprehension-intensive…

Computation and Language · Computer Science 2025-05-26 Essa Jan , Moiz Ali , Muhammad Saram Hassan , Fareed Zaffar , Yasir Zaki

Watermarking has become a key technique for proprietary language models, enabling the distinction between AI-generated and human-written text. However, in many real-world scenarios, LLM-generated content may undergo post-generation edits,…

Machine Learning · Computer Science 2025-10-03 Liyan Xie , Muhammad Siddeek , Mohamed Seif , Andrea J. Goldsmith , Mengdi Wang

To mitigate the potential misuse of large language models (LLMs), recent research has developed watermarking algorithms, which restrict the generation process to leave an invisible trace for watermark detection. Due to the two-stage nature…

Computation and Language · Computer Science 2024-07-02 Shangqing Tu , Yuliang Sun , Yushi Bai , Jifan Yu , Lei Hou , Juanzi Li

We investigate the radioactivity of text generated by large language models (LLM), i.e. whether it is possible to detect that such synthetic input was used to train a subsequent LLM. Current methods like membership inference or active IP…

Cryptography and Security · Computer Science 2024-10-29 Tom Sander , Pierre Fernandez , Alain Durmus , Matthijs Douze , Teddy Furon

The task of discerning between generated and natural texts is increasingly challenging. In this context, watermarking emerges as a promising technique for ascribing generated text to a specific model. It alters the sampling generation…

Computation and Language · Computer Science 2023-11-09 Pierre Fernandez , Antoine Chaffin , Karim Tit , Vivien Chappelier , Teddy Furon

Large Language Models (LLMs) can now solve entire exams directly from uploaded PDF assessments, raising urgent concerns about academic integrity and the reliability of grades and credentials. Existing watermarking techniques either operate…

Computation and Language · Computer Science 2026-01-19 Ashish Raj Shekhar , Shiven Agarwal , Priyanuj Bordoloi , Yash Shah , Tejas Anvekar , Vivek Gupta

In this work, we introduce a novel deep learning-based approach to text-in-image watermarking, a method that embeds and extracts textual information within images to enhance data security and integrity. Leveraging the capabilities of deep…

Multimedia · Computer Science 2024-04-23 Bishwa Karki , Chun-Hua Tsai , Pei-Chi Huang , Xin Zhong

We propose Easymark, a family of embarrassingly simple yet effective watermarks. Text watermarking is becoming increasingly important with the advent of Large Language Models (LLM). LLMs can generate texts that cannot be distinguished from…

Machine Learning · Computer Science 2023-10-16 Ryoma Sato , Yuki Takezawa , Han Bao , Kenta Niwa , Makoto Yamada