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by simondotau 1770 days ago
I don't know exactly what's in the safety token, but we do know that it's grayscale and low resolution.

Allow me to be hypothetical for a moment; let's assume for a moment that the image has all chroma data stripped, it's downsampled to 1 megapixel, and then compressed to around 100 kilobytes using JPEG or HEIC. That would be sufficient for performing careful human review but would completely demolish any steganography.