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.
Published at
2022-01-25 23:36:27Event JSON
{
"id": "65ace84e51e49a512c5f555f36ba4b62c619e2ee37ca9424dd636ef74bbfc70b",
"pubkey": "80b3a39e686e989dceca43b8b9fc22f600e2177f42a9aef8a8442af8dd08886f",
"created_at": 1643153787,
"kind": 1,
"tags": [
[
"imeta",
"url https://social-coop-media.ams3.cdn.digitaloceanspaces.com/media_attachments/files/107/685/726/594/579/059/original/053de9506bb007c6.jpg",
"m image/jpeg"
],
[
"proxy",
"https://social.coop/@jonny/107685726645817029",
"web"
],
[
"proxy",
"https://social.coop/users/jonny/statuses/107685726645817029",
"activitypub"
],
[
"L",
"pink.momostr"
],
[
"l",
"pink.momostr.activitypub:https://social.coop/users/jonny/statuses/107685726645817029",
"pink.momostr"
]
],
"content": "More fun publisher surveillance:\nElsevier 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.\nhttps://social-coop-media.ams3.cdn.digitaloceanspaces.com/media_attachments/files/107/685/726/594/579/059/original/053de9506bb007c6.jpg\n",
"sig": "ec1359d90cc1fb6fb5af2723941db72a331160908e6999bc67a842880d85e193160e71c8cb6f4152d805ffd52dcddb4a79ae49b6da1e9a55a37e87aa10685241"
}
