[poppler] Encrypt with Revision 6 and AES256

Leonard Rosenthol lrosenth at adobe.com
Sun Oct 20 16:48:05 PDT 2013

The documentation is in the Extension Level 8 docs as well as drafts of
ISO 32000-2 for at least 2 years now.


On 10/20/13 7:26 PM, "Brad Hards" <bradh at frogmouth.net> wrote:

>On Mon, 21 Oct 2013 12:29:17 AM Albert Astals Cid wrote:
>> Does anyone have any clue where the spec that mentions Encrypt with
>> 6 and AES256 is?
>> There's such a file at
>> but I can't find anything newer than ISO_PDF32000_2008.pdf and it's not
>> mentioned in there.
>http://www.pdflib.com/knowledge-base/pdf-security/encryption/ (via
>discusses this a bit, but not enough to implement it, and my google foo
>find Extension Level 8 documentation.
>WARNING: Link below is reverse engineered code from acroread binary!
>There is documentation on this algorithm at:
>but it is not from a specification, but instead from adobe object code.
>poppler mailing list
>poppler at lists.freedesktop.org

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