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Check if a file was made with Claude

claude.com

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Re: Check if a file was made with Claude

#31

Post by basedpolymer »

sente wrote: post #6
VCFundedGenYer wrote: post #3

Claude watermarks are a farce and a waste of time. It's hilarious to me that they burn cash to even entertain the idea. Any attempts they use are defeated by a text editor and CTRL SHIFT V. Unicode characters are no new thing. Reminds me of how people tried to argue that NFTs aren't anything more than just jpegs.

You misunderstand how Claude watermarks things.

Most critics of watermarking have no idea how it works. Yet there are valid arguments against (and for) it, but they prefer to be misleading

Re: Check if a file was made with Claude

#32

Post by nixlaz »

>Supported formats: JPG, PNG, GIF, WEBP, TIFF, HEIC, AVIF, SVG, DNG, JXL, MP4, MOV, AVI, WAV, MP3, M4A, FLAC · up to 100 MB

I'm wondering why they have restricted file types. You can't check a PDF for example... surely the main use case for people will be to check if a document was produced or edited by an LLM? That could be an attractive (if not misunderstood) proposition for academics

Re: Check if a file was made with Claude

#33

Post by mhitza »

Tiberium wrote: post #5

This is just C2PA for Claude-processed files, apparently. It's not related to their text watermarking. C2PA is file metadata and can be trivially stripped away, unlike hidden watermarks, e.g. SynthID.

That is where their responsibility ends in terms of the EU AI Act. And that is fine and how it should be, no secret watermarks.

Re: Check if a file was made with Claude

#34

Post by spockz »

nixlaz wrote: post #32

>Supported formats: JPG, PNG, GIF, WEBP, TIFF, HEIC, AVIF, SVG, DNG, JXL, MP4, MOV, AVI, WAV, MP3, M4A, FLAC · up to 100 MB I'm wondering why they have restricted file types. You can't check a PDF for example... surely the main use case for people will be to check if a document was produced or edited by an LLM? That could be an attractive (if not misunderstood) proposition for academics

Luckily all pdfs I made in academia have been generated from source (tex or derivatives, asciidoc) and llm are better in generating source than pdf. Even people that didn’t use tex used Word to generate the pdf.

So I’m unsure what your aiming at.

Re: Check if a file was made with Claude

#35

Post by spockz »

dannyw wrote: post #23
ramon156 wrote: post #22

Earlier quoted context omitted.

The way I read it, I thought they would just check if the file hash exists on their end. Is that not the case?

That’s incompatible with the file not leaving your browser, which you can trivially verify with the Network tab in chrome (or wireshack, etc). This is just a C2PA metadata checker.

Why? The browser can see the file and contents so it can calculate and send the hash over without the actual file ever leaving the browser.

Re: Check if a file was made with Claude

#36

Post by csmoak »

As far as I can tell, this and the recent change to add watermarking to text outputs[1], is to become compliant with the EU AI Act[2] and CA's AI Transparency Act[3], SB-942[4]. For large enough companies, all generated AI content is required to have watermarking.

[1] https://www.anthropic.com/news/claude-text-watermark

[2] https://digital-strategy.ec.europa.eu/en/policies/code-pract...

[3] https://www.kqed.org/news/12095398/new-california-law-requir...

[4] https://www.leginfo.legislature.ca.gov/faces/billTextClient....

Re: Check if a file was made with Claude

#38

Post by tom1337 »

Unfortunately this is just for Media? Some manual tells for Excel or PDFs is to check the author. Claude creates PDFs via wkhtmltopdf so the PDF Producer will be Qt and the Content Creator is wkhtmltopdf. Xlsx files are being created via openpyxl so in the metadata that is the author.
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