Editing Away the Evidence: Diffusion-Based Image Manipulation and the Failure Modes of Robust Watermarking

• URL: http://arxiv.org/abs/2603.12949v1
• Date: Fri, 13 Mar 2026 12:46:27 GMT
• Title: Editing Away the Evidence: Diffusion-Based Image Manipulation and the Failure Modes of Robust Watermarking
• Abstract summary: diffusion-based image editing injects noise and reconstructs images through a powerful generative prior.<n>We show that non-adversarial diffusion editing can unintentionally degrade or remove robust watermarks.<n>Results indicate that even routine semantic edits can significantly reduce watermark recoverability.
• Score: 0.3644540605358075
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Robust invisible watermarks are widely used to support copyright protection, content provenance, and accountability by embedding hidden signals designed to survive common post-processing operations. However, diffusion-based image editing introduces a fundamentally different class of transformations: it injects noise and reconstructs images through a powerful generative prior, often altering semantic content while preserving photorealism. In this paper, we provide a unified theoretical and empirical analysis showing that non-adversarial diffusion editing can unintentionally degrade or remove robust watermarks. We model diffusion editing as a stochastic transformation that progressively contracts off-manifold perturbations, causing the low-amplitude signals used by many watermarking schemes to decay. Our analysis derives bounds on watermark signal-to-noise ratio and mutual information along diffusion trajectories, yielding conditions under which reliable recovery becomes information-theoretically impossible. We further evaluate representative watermarking systems under a range of diffusion-based editing scenarios and strengths. The results indicate that even routine semantic edits can significantly reduce watermark recoverability. Finally, we discuss the implications for content provenance and outline principles for designing watermarking approaches that remain robust under generative image editing.

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