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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

A new technique for data hiding in digital image is proposed in this paper. Steganography is a well known technique for hiding data in an image, but generally the format of image plays a pivotal role in it, and the scheme is format…

Multimedia · Computer Science 2013-08-01 Adity Sharma , Anoo Agarwal , Vinay Kumar

Digital image watermarking seeks to protect the digital media information from unauthorized access, where the message is embedded into the digital image and extracted from it, even some noises or distortions are applied under various data…

Computer Vision and Pattern Recognition · Computer Science 2021-12-28 Hong-Bo Xu , Rong Wang , Jia Wei , Shao-Ping Lu

Large Language Model (LLM) watermarking embeds detectable signals into generated text for copyright protection, misuse prevention, and content detection. While prior studies evaluate robustness using watermark removal attacks, these methods…

Cryptography and Security · Computer Science 2025-09-16 Zhaoxi Zhang , Xiaomei Zhang , Yanjun Zhang , He Zhang , Shirui Pan , Bo Liu , Asif Qumer Gill , Leo Yu Zhang

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

We introduce FontCode, an information embedding technique for text documents. Provided a text document with specific fonts, our method embeds user-specified information in the text by perturbing the glyphs of text characters while…

Computer Vision and Pattern Recognition · Computer Science 2019-06-12 Chang Xiao , Cheng Zhang , Changxi Zheng

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

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

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

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

Code Summarization Model (CSM) has been widely used in code production, such as online and web programming for PHP and Javascript. CSMs are essential tools in code production, enhancing software development efficiency and driving innovation…

Cryptography and Security · Computer Science 2025-02-11 Jiale Zhang , Haoxuan Li , Di Wu , Xiaobing Sun , Qinghua Lu , Guodong Long

Covert communication (also known as steganography) is the practice of concealing a secret inside an innocuous-looking public object (cover) so that the modified public object (covert code) makes sense to everyone but only someone who knows…

Computation and Language · Computer Science 2023-12-29 Leela Raj-Sankar , S. Raj Rajagopalan

The rapid advancement of Large Language Models (LLMs) has significantly enhanced the capabilities of text generators. With the potential for misuse escalating, the importance of discerning whether texts are human-authored or generated by…

Multimedia · Computer Science 2024-03-12 Travis Munyer , Abdullah Tanvir , Arjon Das , Xin Zhong

Training data is a critical and often proprietary asset in Large Language Model (LLM) development, motivating the use of data watermarking to embed model-transferable signals for usage verification. We identify low coverage as a vital yet…

Cryptography and Security · Computer Science 2026-04-30 Hengyu Wu , Yang Cao

With the fast development of natural language processing, recent advances in information hiding focus on covertly embedding secret information into texts. These algorithms either modify a given cover text or directly generate a text…

Cryptography and Security · Computer Science 2022-08-04 Xiaoyan Zheng , Yurun Fang , Hanzhou Wu

While large code language models have made significant strides in AI-assisted coding tasks, there are growing concerns about privacy challenges. The user code is transparent to the cloud LLM service provider, inducing risks of unauthorized…

Computation and Language · Computer Science 2024-10-10 Yalan Lin , Chengcheng Wan , Yixiong Fang , Xiaodong Gu

Recent steganographic schemes, starting with Meteor (CCS'21), rely on leveraging large language models (LLMs) to resolve a historically-challenging task of disguising covert communication as ``innocent-looking'' natural-language…

Cryptography and Security · Computer Science 2025-04-15 Neil Perry , Sanket Gupte , Nishant Pitta , Lior Rotem

The availability of bandwidth for internet access is sufficient enough to communicate digital assets. These digital assets are subjected to various types of threats. [19] As a result of this, protection mechanism required for the protection…

Multimedia · Computer Science 2013-01-23 Mahimn Pandya , Hiren Joshi , Ashish Jani

The advent of video-based Large Language Models (LLMs) has significantly enhanced video understanding. However, it has also raised some safety concerns regarding data protection, as videos can be more easily annotated, even without…

Computer Vision and Pattern Recognition · Computer Science 2024-07-04 Jinmin Li , Kuofeng Gao , Yang Bai , Jingyun Zhang , Shu-Tao Xia

Deep Learning (DL) models have caused a paradigm shift in our ability to comprehend raw data in various important fields, ranging from intelligence warfare and healthcare to autonomous transportation and automated manufacturing. A practical…

Cryptography and Security · Computer Science 2018-06-04 Bita Darvish Rouhani , Huili Chen , Farinaz Koushanfar