this post was submitted on 20 Oct 2025
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Privacy
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Exif data. It can be removed with various apps but its in photos by default on most devices
or just the individual characteristics and flaws of the lens/sensor/postprocessing software, some of which can be unique per device, and potentially comparable to other photos made with it.
Even without EXIF data I would bet the actual encoding of the image will be identifiable to a specific instance of the camera software.
Similar to how websites fingerprint your browser by rendering something in the canvas or webgl and sending back the rendered image. The exact same rendering procedure will produce slightly different images for each browser instance. I suspect browsers are fully aware and complicit in this because why the actual fuck would they not make the rendering engines deterministic to their inputs?!
In that case, looks like they didn't remove the EXIF data.