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Who Stole Your Data? A Method for Detecting Unauthorized RAG Theft

Published: October 9, 2025 | arXiv ID: 2510.07728v1

By: Peiyang Liu , Ziqiang Cui , Di Liang and more

Potential Business Impact:

Protects AI writing from being stolen.

Business Areas:
DRM Content and Publishing, Media and Entertainment, Privacy and Security

Retrieval-augmented generation (RAG) enhances Large Language Models (LLMs) by mitigating hallucinations and outdated information issues, yet simultaneously facilitates unauthorized data appropriation at scale. This paper addresses this challenge through two key contributions. First, we introduce RPD, a novel dataset specifically designed for RAG plagiarism detection that encompasses diverse professional domains and writing styles, overcoming limitations in existing resources. Second, we develop a dual-layered watermarking system that embeds protection at both semantic and lexical levels, complemented by an interrogator-detective framework that employs statistical hypothesis testing on accumulated evidence. Extensive experimentation demonstrates our approach's effectiveness across varying query volumes, defense prompts, and retrieval parameters, while maintaining resilience against adversarial evasion techniques. This work establishes a foundational framework for intellectual property protection in retrieval-augmented AI systems.

Country of Origin
🇨🇳 🇭🇰 China, Hong Kong

Page Count
36 pages

Category
Computer Science:
Information Retrieval