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I think this article only applies to older PDFs. From what I can tell, PDF2.0 changed the encryption to AES-256. Almost none of the PDF tools the article mentio
by erpellan 9y ago
I think this article only applies to older PDFs. From what I can tell, PDF2.0 changed the encryption to AES-256. Almost none of the PDF tools the article mentioned can even recognise PDF2.0
https://www.pdflib.com/knowledge-base/pdf-password-security/encryption/ https://www.pdflib.com/knowledge-base/pdf-password-security/...
- agumonkey 9y agoWasn't even aware that PDF2.0 was out
- dunham 9y agoNeither was I. It appears to have been released around July 2017 as ISO 32000-2:2017.
- phonon 9y agoI don't think there are any PDF 2.0 files "out in the wild" yet. In any case the article is about a 40 bit RC4 key. PDF has supported much much stronger encryption schemes for a very very long time. https://www.pdflib.com/knowledge-base/pdf-password-security/encryption/ https://www.pdflib.com/knowledge-base/pdf-password-security/...
- deleted 9y ago[deleted]