ComMark: Covert and Robust Black-Box Model Watermarking with Compressed Samples

• URL: http://arxiv.org/abs/2512.15641v1
• Date: Tue, 16 Dec 2025 05:10:32 GMT
• Title: ComMark: Covert and Robust Black-Box Model Watermarking with Compressed Samples
• Authors: Yunfei Yang, Xiaojun Chen, Zhendong Zhao, Yu Zhou, Xiaoyan Gu, Juan Cao,
• Abstract summary: ComMark is a novel black-box model watermarking framework.<n>We show that ComMark achieves state-of-the-art performance in both covertness and robustness.<n>We extend its applicability beyond image recognition to tasks including speech recognition, sentiment analysis, image generation, image captioning, and video recognition.
• Score: 14.929889375744368
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 the critical need for robust intellectual property protection. Model watermarking has emerged as an effective solution, with black-box watermarking gaining significant attention for its practicality and flexibility. Nonetheless, existing black-box methods often fail to better balance covertness (hiding the watermark to prevent detection and forgery) and robustness (ensuring the watermark resists removal)-two essential properties for real-world copyright verification. In this paper, we propose ComMark, a novel black-box model watermarking framework that leverages frequency-domain transformations to generate compressed, covert, and attack-resistant watermark samples by filtering out high-frequency information. To further enhance watermark robustness, our method incorporates simulated attack scenarios and a similarity loss during training. Comprehensive evaluations across diverse datasets and architectures demonstrate that ComMark achieves state-of-the-art performance in both covertness and robustness. Furthermore, we extend its applicability beyond image recognition to tasks including speech recognition, sentiment analysis, image generation, image captioning, and video recognition, underscoring its versatility and broad applicability.

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