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Several graph theoretic watermark methods have been proposed to encode numbers as graph structures in software watermarking environments. In this paper, we propose an efficient and easily implementable codec system for encoding watermark…

Data Structures and Algorithms · Computer Science 2017-12-25 Maria Chroni , Stavros D. Nikolopoulos , Leonidas Palios

In a software watermarking environment, several graph theoretic watermark methods use numbers as watermark values, where some of these methods encode the watermark numbers as graph structures. In this paper we extended the class of error…

Data Structures and Algorithms · Computer Science 2011-10-07 Maria Chroni , Stavros D. Nikolopoulos

In the domain of software watermarking, we have proposed several graph theoretic watermarking codec systems for encoding watermark numbers $w$ as reducible permutation flow-graphs $F[\pi^*]$ through the use of self-inverting permutations…

Discrete Mathematics · Computer Science 2018-12-31 Anna Mpanti , Stavros D. Nikolopoulos , Leonidas Palios

Software watermarking involves embedding a unique identifier or, equivalently, a watermark value within a software to prove owner's authenticity and thus to prevent or discourage copyright infringement. Towards the embedding process,…

Multimedia · Computer Science 2014-03-27 Ioannis Chionis , Maria Chroni , Stavros D. Nikolopoulos

This work provides to web users copyright protection of their Portable Document Format (PDF) documents by proposing efficient and easily implementable techniques for PDF watermarking; our techniques are based on the ideas of our recently…

Multimedia · Computer Science 2015-01-13 Maria Chroni , Stavros D. Nikolopoulos

We address the problem of watermarking graph objects, which consists in hiding information within them, to prove their origin. The two existing methods to watermark graphs use subgraph matching or graph isomorphism techniques, which are…

Data Structures and Algorithms · Computer Science 2025-08-05 Jade Garcia Bourrée , Anne-Marie Kermarrec , Erwan Le Merrer , Othmane Safsafi

We introduce models and algorithmic foundations for graph watermarking. Our frameworks include security definitions and proofs, as well as characterizations when graph watermarking is algorithmically feasible, in spite of the fact that the…

Multimedia · Computer Science 2016-06-01 David Eppstein , Michael T. Goodrich , Jenny Lam , Nil Mamano , Michael Mitzenmacher , Manuel Torres

Watermarking of large language models (LLMs) generation embeds an imperceptible statistical pattern within texts, making it algorithmically detectable. Watermarking is a promising method for addressing potential harm and biases from LLMs,…

Cryptography and Security · Computer Science 2024-12-09 Lingjie Chen , Ruizhong Qiu , Siyu Yuan , Zhining Liu , Tianxin Wei , Hyunsik Yoo , Zhichen Zeng , Deqing Yang , Hanghang Tong

The rapid growth of transformer-based models increases the concerns about their integrity and ownership insurance. Watermarking addresses this issue by embedding a unique identifier into the model, while preserving its performance. However,…

Cryptography and Security · Computer Science 2024-01-19 Pierre Fernandez , Guillaume Couairon , Teddy Furon , Matthijs Douze

Recent years have witnessed the prosperous development of Graph Self-supervised Learning (GSSL), which enables to pre-train transferable foundation graph encoders. However, the easy-to-plug-in nature of such encoders makes them vulnerable…

Cryptography and Security · Computer Science 2024-12-10 Xiangyu Zhao , Hanzhou Wu , Xinpeng Zhang

Digital watermarks have been considered a promising way to fight software piracy. Graph-based watermarking schemes encode authorship/ownership data as control-flow graph of dummy code. In 2012, Chroni and Nikolopoulos developed an ingenious…

Deepfakes refer to content synthesized using deep generators, which, when misused, have the potential to erode trust in digital media. Synthesizing high-quality deepfakes requires access to large and complex generators only a few entities…

Machine Learning · Computer Science 2023-11-09 Nils Lukas , Florian Kerschbaum

The expansion of the open source community and the rise of large language models have raised ethical and security concerns on the distribution of source code, such as misconduct on copyrighted code, distributions without proper licenses, or…

Cryptography and Security · Computer Science 2024-01-03 Borui Yang , Wei Li , Liyao Xiang , Bo Li

Reversible visible watermarking (RVW) is an active copyright protection mechanism. It not only transparently superimposes copyright patterns on specific positions of digital images or video frames to declare the copyright ownership…

Multimedia · Computer Science 2022-01-12 Wenfa Qi , Sirui Guo , Wei Hu

Graph-structured data is foundational to numerous web applications, and watermarking is crucial for protecting their intellectual property and ensuring data provenance. Existing watermarking methods primarily operate on graph structures or…

Machine Learning · Computer Science 2026-01-22 Jiasen Li , Yanwei Liu , Zhuoyi Shang , Xiaoyan Gu , Weiping Wang

The wide deployment of Face Recognition (FR) systems poses privacy risks. One countermeasure is adversarial attack, deceiving unauthorized malicious FR, but it also disrupts regular identity verification of trusted authorizers, exacerbating…

Cryptography and Security · Computer Science 2024-10-24 Yunming Zhang , Dengpan Ye , Caiyun Xie , Sipeng Shen , Ziyi Liu , Jiacheng Deng , Long Tang

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

In this paper, we propose a new decoding method called Permute-and-Flip (PF) decoder. It enjoys stability properties similar to the standard sampling decoder, but is provably up to 2x better in its quality-stability tradeoff than sampling…

Computation and Language · Computer Science 2025-03-18 Xuandong Zhao , Lei Li , Yu-Xiang Wang

In recent years, there has been significant advancement in the field of model watermarking techniques. However, the protection of image-processing neural networks remains a challenge, with only a limited number of methods being developed.…

Cryptography and Security · Computer Science 2023-02-20 Huajie Chen , Tianqing Zhu , Chi Liu , Shui Yu , Wanlei Zhou

From network topologies to online social networks, many of today's most sensitive datasets are captured in large graphs. A significant challenge facing owners of these datasets is how to share sensitive graphs with collaborators and…

Cryptography and Security · Computer Science 2015-06-02 Xiaohan Zhao , Qingyun Liu , Lin Zhou , Haitao Zheng , Ben Y. Zhao
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