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Re:Sci-Hub: Public access to research papers by snowpanda on Tuesday October 24, 2017 @06:34AM (#15540598)
Does only Crossref do this?

I'm asking because a friend of mine who's enrolled in 2 colleges, just downloaded the same scholarly PDF (one that's also available through sci-hub) with 2 different college credentials and they had the same sha256sum.

Then when he tried it through sci-hub, he also got the same sha256sum.

Re:Sci-Hub: Public access to research papers by afandian on Tuesday October 24, 2017 @08:50AM (#15541144)
Crossref doesn't do anything at all in relation to SciHub or watermarking PDFs. We don't host content. (I'm happy to talk about what we do do, but it's off-topic)

Sorry if my disclaimer wasn't clear. I was just pointing out affiliation as standard on HN.