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2022-01-25 23:36:27

jonny on Nostr: More fun publisher surveillance: Elsevier embeds a hash in the PDF metadata that is ...

More fun publisher surveillance:
Elsevier embeds a hash in the PDF metadata that is *unique for each time a PDF is downloaded*, this is a diff between metadata from two of the same paper. Combined with access timestamps, they can uniquely identify the source of any shared PDFs.

Author Public Key
npub1qwxhj53fqylj0exmwadaxx6wu0cmt5ak3nmjv0g3k0jhznem2gksgp3kdr