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big_toastyesterday at 8:48 PM3 repliesview on HN

What information is included in the metadata or SynthID? How many bits can be encoded in a SynthID?

Can it be used to create something like nutritional labels for synthetic content? 10% synthetic text, 30 synthetic images.

Your reality was 15% synthetic today (75% mega corp, 25% open-weight neocloud).


Replies

big_toastyesterday at 9:54 PM

I guess the SynthID-Image paper from Oct 2025[0] was an encoder-decoder for which they tested checking a flag or a 136 bit payload in 512x512 images and the watermark's robustness after various transformations.

Presumably the deployed version is meaningfully different.

[0]:https://arxiv.org/html/2510.09263v1

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gumby271today at 12:19 AM

Or perhaps a user id or fingerprint to an individual. We added that to printers long ago, this would easily enable that for every photo and image you generate too.

janalsncmyesterday at 10:21 PM

Don’t think that would be possible. If I paste a synthetic piece into an otherwise organic image, the synth id isn’t going to know that.

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