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AI SecurityEmerging1 sourceAug 25, 2026 · 16:10via CyberInsider

Microsoft Paint embeds hidden IDs in locally generated AI images

Brief

Microsoft Paint and Photos appear to embed an invisible, server-issued identifier into AI-generated images, including pictures created locally on Copilot+ PCs. Reverse engineering shows that while image generation can happen on-device, prompts are still sent to Microsoft for moderation, which returns a unique GUID that is then hidden inside the image pixels. The findings come …

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