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Generative images have proliferated on Web platforms in social media and online copyright distribution scenarios, and semantic watermarking has increasingly been integrated into diffusion models to support reliable provenance tracking and…

Machine Learning · Computer Science 2026-02-26 Zheng Gao , Xiaoyu Li , Zhicheng Bao , Xiaoyan Feng , Jiaojiao Jiang

To mitigate the potential harms of Large Language Models (LLMs)generated text, researchers have proposed watermarking, a process of embedding detectable signals within text. With watermarking, we can always accurately detect LLM-generated…

Computation and Language · Computer Science 2025-11-19 William Guo , Adaku Uchendu , Ana Smith

Cross-Lingual Summarization (CLS) is a task that extracts important information from a source document and summarizes it into a summary in another language. It is a challenging task that requires a system to understand, summarize, and…

Computation and Language · Computer Science 2022-04-26 Yu Bai , Heyan Huang , Kai Fan , Yang Gao , Yiming Zhu , Jiaao Zhan , Zewen Chi , Boxing Chen

LLM watermarks must be detectable without compromising text quality, yet most existing schemes bias the next-token distribution and pay for detection with measurable quality loss. We present SLAM (Structural Linguistic Activation Marking),…

Computation and Language · Computer Science 2026-05-12 Fabrice Harel-Canada , Amit Sahai

Semantic-level watermarking (SWM) improves robustness against text modifications by treating sentences as the basic unit. However, robustness to paragraph-level paraphrasing remains difficult because such attacks globally disrupt watermark…

Cryptography and Security · Computer Science 2026-05-26 Jiahao Huo , Wenjie Qu , Yibo Yan , Kening Zheng , Jiaheng Zhang , Xuming Hu , Philip S. Yu , Mingxun Zhou

Watermarking provides a critical safeguard for large language model (LLM) services by facilitating the detection of LLM-generated text. Correspondingly, stealing watermark algorithms (SWAs) derive watermark information from watermarked…

Cryptography and Security · Computer Science 2026-04-14 Shuhao Zhang , Yuli Chen , Jiale Han , Bo Cheng , Jiabao Ma

Cross-lingual Summarization (CLS) aims at producing a summary in the target language for an article in the source language. Traditional solutions employ a two-step approach, i.e. translate then summarize or summarize then translate.…

Computation and Language · Computer Science 2020-10-20 Ruochen Xu , Chenguang Zhu , Yu Shi , Michael Zeng , Xuedong Huang

Training data detection is critical for enforcing copyright and data licensing, as Large Language Models (LLM) are trained on massive text corpora scraped from the internet. We present SPECTRA, a watermarking approach that makes training…

Computation and Language · Computer Science 2026-03-25 Pranav Shetty , Mirazul Haque , Petr Babkin , Zhiqiang Ma , Xiaomo Liu , Manuela Veloso

Smart contract code summarization is crucial for efficient maintenance and vulnerability mitigation. While many studies use Large Language Models (LLMs) for summarization, their performance still falls short compared to fine-tuned models…

Software Engineering · Computer Science 2025-03-14 Xiaoqi Li , Yingjie Mao , Zexin Lu , Wenkai Li , Zongwei Li

Existing sentence-level watermarking methods enhance robustness to paraphrasing by anchoring watermarks in sentence semantics. However, their prefix-based designs remain vulnerable to structural perturbations, such as sentence splitting and…

Cryptography and Security · Computer Science 2026-05-29 Yuexin Li , Wenjie Qu , Linyu Wu , Yulin Chen , Yufei He , Tri Cao , Bryan Hooi , Jiaheng Zhang

LLM watermarking has attracted attention as a promising way to detect AI-generated content, with some works suggesting that current schemes may already be fit for deployment. In this work we dispute this claim, identifying watermark…

Machine Learning · Computer Science 2024-06-25 Nikola Jovanović , Robin Staab , Martin Vechev

We introduce SWAN (Semantic Watermarking with Abstract Meaning Representation), a novel framework that embeds watermark signatures into the semantic structure of a sentence using Abstract Meaning Representation (AMR). In contrast to…

Multilingual watermarking aims to make large language model (LLM) outputs traceable across languages, yet current methods still fall short. Despite claims of cross-lingual robustness, they are evaluated only on high-resource languages. We…

Computation and Language · Computer Science 2026-03-26 Asim Mohamed , Martin Gubri

Cross-lingual summarization (CLS) is the task to produce a summary in one particular language for a source document in a different language. Existing methods simply divide this task into two steps: summarization and translation, leading to…

Computation and Language · Computer Science 2019-09-04 Junnan Zhu , Qian Wang , Yining Wang , Yu Zhou , Jiajun Zhang , Shaonan Wang , Chengqing Zong

Statistical watermarking is a common approach for verifying whether text was written by a language model. Most existing schemes assume autoregressive generation, where tokens are produced left to right and contextual hashing is well…

Computation and Language · Computer Science 2026-05-08 Mohd Ruhul Ameen , Akif Islam , Nadim Mahmud , Md. Ekramul Hamid

Watermarking is a key technique for detecting AI-generated text. In this work, we study its vulnerabilities and introduce the Smoothing Attack, a novel watermark removal method. By leveraging the relationship between the model's confidence…

Machine Learning · Computer Science 2025-02-06 Hongyan Chang , Hamed Hassani , Reza Shokri

In this paper, we investigate the recent state-of-the-art schemes for watermarking large language models (LLMs) outputs. These techniques are claimed to be robust, scalable and production-grade, aimed at promoting responsible usage of LLMs.…

Cryptography and Security · Computer Science 2026-05-11 Jonathan Hong Jin Ng , Anh Tu Ngo , Anupam Chattopadhyay

With the widespread adoption of Large Language Models (LLMs), concerns about potential misuse have emerged. To this end, watermarking has been adapted to LLM, enabling a simple and effective way to detect and monitor generated text.…

Cryptography and Security · Computer Science 2024-07-22 Duy C. Hoang , Hung T. Q. Le , Rui Chu , Ping Li , Weijie Zhao , Yingjie Lao , Khoa D. Doan

The proliferation of open-source code and large language models (LLMs) for code generation has amplified the risks of unauthorized reuse and intellectual property infringement. Source code watermarking offers a potential solution, yet…

Cryptography and Security · Computer Science 2026-04-21 Rui Xu , Jiawei Chen , Weizhi Liu , Zhaoxia Yin , Cong Kong , Xinpeng Zhang

Recent progress in large language models enables the creation of realistic machine-generated content. Watermarking is a promising approach to distinguish machine-generated text from human text, embedding statistical signals in the output…

Cryptography and Security · Computer Science 2026-02-25 Patrick Chao , Yan Sun , Edgar Dobriban , Hamed Hassani