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Text watermarks in large language models (LLMs) are an increasingly important tool for detecting synthetic text and distinguishing human-written content from LLM-generated text. While most existing studies focus on determining whether…

Machine Learning · Statistics 2025-06-30 Xiang Li , Garrett Wen , Weiqing He , Jiayuan Wu , Qi Long , Weijie J. Su

Existing watermarking algorithms are vulnerable to paraphrase attacks because of their token-level design. To address this issue, we propose SemStamp, a robust sentence-level semantic watermarking algorithm based on locality-sensitive…

Recent advancements in watermarking techniques have enabled the embedding of secret messages into AI-generated text (AIGT), serving as an important mechanism for AIGT detection. Existing methods typically interfere with the generation…

Cryptography and Security · Computer Science 2025-06-10 Peiru Yang , Xintian Li , Wanchun Ni , Jinhua Yin , Huili Wang , Guoshun Nan , Shangguang Wang , Yongfeng Huang , Tao Qi

Large language models (LLMs) are widely deployed in multiple scenarios due to reasoning capabilities. In order to prevent the models from being misused, watermarking is generally employed to ensure ownership. However, most existing…

Cryptography and Security · Computer Science 2026-04-29 Ziming Zhang , Li Li , Guorui Feng , Hanzhou Wu , Xinpeng Zhang

Watermarking techniques offer a promising way to identify machine-generated content via embedding covert information into the contents generated from language models (LMs). However, the robustness of the watermarking schemes has not been…

Computation and Language · Computer Science 2025-07-04 Ruibo Chen , Yihan Wu , Junfeng Guo , Heng Huang

The rapid advancement of deep learning has turned models into highly valuable assets due to their reliance on massive data and costly training processes. However, these models are increasingly vulnerable to leakage and theft, highlighting…

Cryptography and Security · Computer Science 2026-05-01 Yunfei Yang , Xiaojun Chen , Zhendong Zhao , Yu Zhou , Xiaoyan Gu , Juan Cao

Large language models (LLMs) can be trained or fine-tuned on data obtained without the owner's consent. Verifying whether a specific LLM was trained on particular data instances or an entire dataset is extremely challenging. Dataset…

Computation and Language · Computer Science 2025-10-07 Eyal German , Sagiv Antebi , Edan Habler , Asaf Shabtai , Yuval Elovici

With the rapid growth of Large Language Models (LLMs), safeguarding textual content against unauthorized use is crucial. Watermarking offers a vital solution, protecting both - LLM-generated and plain text sources. This paper presents a…

Computation and Language · Computer Science 2025-07-08 Harsh Nishant Lalai , Aashish Anantha Ramakrishnan , Raj Sanjay Shah , Dongwon Lee

Watermarking involves implanting an imperceptible signal into generated text that can later be detected via statistical tests. A prominent family of watermarking strategies for LLMs embeds this signal by upsampling a (pseudorandomly-chosen)…

Computation and Language · Computer Science 2024-10-22 Anirudh Ajith , Sameer Singh , Danish Pruthi

Natural language processing (NLP) technology has shown great commercial value in applications such as sentiment analysis. But NLP models are vulnerable to the threat of pirated redistribution, damaging the economic interests of model…

Cryptography and Security · Computer Science 2022-11-21 Long Dai , Jiarong Mao , Xuefeng Fan , Xiaoyi Zhou

Semantic-level watermarking (SWM) for large language models (LLMs) enhances watermarking robustness against text modifications and paraphrasing attacks by treating the sentence as the fundamental unit. However, existing methods still lack…

Cryptography and Security · Computer Science 2026-03-03 Jiahao Huo , Shuliang Liu , Bin Wang , Junyan Zhang , Yibo Yan , Aiwei Liu , Xuming Hu , Mingxun Zhou

Watermarking technology has gained significant attention due to the increasing importance of intellectual property (IP) rights, particularly with the growing deployment of large language models (LLMs) on billions resource-constrained edge…

Cryptography and Security · Computer Science 2025-07-14 Qingxiao Guo , Xinjie Zhu , Yilong Ma , Hui Jin , Yunhao Wang , Weifeng Zhang , Xiaobing Guo

Capacity, Robustness, & Perceptual quality of watermark data are very important issues to be considered. A lot of research is going on to increase these parameters for watermarking of the digital images, as there is always a tradeoff among…

Computer Vision and Pattern Recognition · Computer Science 2010-04-27 Er. Deepak Aggarwal , Er. Sandeep Kaur , Er. Anantdeep

Large Language Models (LLMs) have demonstrated impressive capabilities in generating diverse and contextually rich text. However, concerns regarding copyright infringement arise as LLMs may inadvertently produce copyrighted material. In…

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

The increasing use of Large Language Models (LLMs) for generating highly coherent and contextually relevant text introduces new risks, including misuse for unethical purposes such as disinformation or academic dishonesty. To address these…

Computation and Language · Computer Science 2024-10-16 Zhenyu Xu , Kun Zhang , Victor S. Sheng

Large language models (LLMs) are increasingly integrated into real-world personalized applications through retrieval-augmented generation (RAG) mechanisms to supplement their responses with domain-specific knowledge. However, the valuable…

Cryptography and Security · Computer Science 2025-05-26 Junfeng Guo , Yiming Li , Ruibo Chen , Yihan Wu , Chenxi Liu , Yanshuo Chen , Heng Huang

Rapid advancements in video diffusion models have enabled the creation of realistic videos, raising concerns about unauthorized use and driving the demand for techniques to protect model ownership. Existing watermarking methods, while…

Computer Vision and Pattern Recognition · Computer Science 2025-03-31 MinHyuk Jang , Youngdong Jang , JaeHyeok Lee , Feng Yang , Gyeongrok Oh , Jongheon Jeong , Sangpil Kim

Watermarking has emerged as a promising technique to track AI-generated content and differentiate it from authentic human creations. While prior work extensively studies watermarking for autoregressive large language models (LLMs) and image…

Cryptography and Security · Computer Science 2026-02-16 Avi Bagchi , Akhil Bhimaraju , Moulik Choraria , Daniel Alabi , Lav R. Varshney

Watermarking techniques for large language models (LLMs), which encode hidden information in the output so its source can be verified, have gained significant attention in recent days, thanks to their potential capability to detect…

Computer Science and Game Theory · Computer Science 2026-05-15 Juho Kim , Fei Fang , Tuomas Sandholm