Where do they get the key from? | Hacker News

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		criddell on Jan 26, 2022 \| parent \| context \| favorite \| on: Elsevier embeds a hash in the PDF metadata that is... Where do they get the key from?

oauea on Jan 26, 2022 [–]

No key needed, else you'd need one for viewing the content too.

criddell on Jan 26, 2022 | [–]

You do need a key just to view. Acrobat 9 and above uses AES with a 256-bit key. I think it's all built on Adobe's Digital Editions technology.

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