Hot-Swap MarkBoard: An Efficient Black-box Watermarking Approach for Large-scale Model Distribution

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Hauptverfasser: Zhang, Zhicheng, Lv, Peizhuo, Wan, Mengke, Fang, Jiang, Guo, Diandian, Chen, Yezeng, Liu, Yinlong, Ma, Wei, Sun, Jiyan, Geng, Liru
Format: Preprint
Veröffentlicht: 2025
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author Zhang, Zhicheng
Lv, Peizhuo
Wan, Mengke
Fang, Jiang
Guo, Diandian
Chen, Yezeng
Liu, Yinlong
Ma, Wei
Sun, Jiyan
Geng, Liru
author_facet Zhang, Zhicheng
Lv, Peizhuo
Wan, Mengke
Fang, Jiang
Guo, Diandian
Chen, Yezeng
Liu, Yinlong
Ma, Wei
Sun, Jiyan
Geng, Liru
contents Recently, Deep Learning (DL) models have been increasingly deployed on end-user devices as On-Device AI, offering improved efficiency and privacy. However, this deployment trend poses more serious Intellectual Property (IP) risks, as models are distributed on numerous local devices, making them vulnerable to theft and redistribution. Most existing ownership protection solutions (e.g., backdoor-based watermarking) are designed for cloud-based AI-as-a-Service (AIaaS) and are not directly applicable to large-scale distribution scenarios, where each user-specific model instance must carry a unique watermark. These methods typically embed a fixed watermark, and modifying the embedded watermark requires retraining the model. To address these challenges, we propose Hot-Swap MarkBoard, an efficient watermarking method. It encodes user-specific $n$-bit binary signatures by independently embedding multiple watermarks into a multi-branch Low-Rank Adaptation (LoRA) module, enabling efficient watermark customization without retraining through branch swapping. A parameter obfuscation mechanism further entangles the watermark weights with those of the base model, preventing removal without degrading model performance. The method supports black-box verification and is compatible with various model architectures and DL tasks, including classification, image generation, and text generation. Extensive experiments across three types of tasks and six backbone models demonstrate our method's superior efficiency and adaptability compared to existing approaches, achieving 100\% verification accuracy.
format Preprint
id arxiv_https___arxiv_org_abs_2507_20650
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Hot-Swap MarkBoard: An Efficient Black-box Watermarking Approach for Large-scale Model Distribution
Zhang, Zhicheng
Lv, Peizhuo
Wan, Mengke
Fang, Jiang
Guo, Diandian
Chen, Yezeng
Liu, Yinlong
Ma, Wei
Sun, Jiyan
Geng, Liru
Cryptography and Security
Artificial Intelligence
Computer Vision and Pattern Recognition
Recently, Deep Learning (DL) models have been increasingly deployed on end-user devices as On-Device AI, offering improved efficiency and privacy. However, this deployment trend poses more serious Intellectual Property (IP) risks, as models are distributed on numerous local devices, making them vulnerable to theft and redistribution. Most existing ownership protection solutions (e.g., backdoor-based watermarking) are designed for cloud-based AI-as-a-Service (AIaaS) and are not directly applicable to large-scale distribution scenarios, where each user-specific model instance must carry a unique watermark. These methods typically embed a fixed watermark, and modifying the embedded watermark requires retraining the model. To address these challenges, we propose Hot-Swap MarkBoard, an efficient watermarking method. It encodes user-specific $n$-bit binary signatures by independently embedding multiple watermarks into a multi-branch Low-Rank Adaptation (LoRA) module, enabling efficient watermark customization without retraining through branch swapping. A parameter obfuscation mechanism further entangles the watermark weights with those of the base model, preventing removal without degrading model performance. The method supports black-box verification and is compatible with various model architectures and DL tasks, including classification, image generation, and text generation. Extensive experiments across three types of tasks and six backbone models demonstrate our method's superior efficiency and adaptability compared to existing approaches, achieving 100\% verification accuracy.
title Hot-Swap MarkBoard: An Efficient Black-box Watermarking Approach for Large-scale Model Distribution
topic Cryptography and Security
Artificial Intelligence
Computer Vision and Pattern Recognition
url https://arxiv.org/abs/2507.20650