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https://issues.apache.org/jira/browse/FOP-2248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13661439#comment-13661439
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Luis Bernardo commented on FOP-2248:
------------------------------------

committed: http://svn.apache.org/viewvc?view=revision&revision=1484190.

Note: The above commit implements AES 256 PDF encryption as described in PDF 
1.7 Extension Level 3 and supported by Adobe Acrobat/Reader 9 (and higher). 
This first proposal for AES 256 encryption was shown to have some shortcomings 
and was not accepted by the ISO committee that oversees the PDF spec. A second 
proposal described in PDF 1.7 Extension Level 8, and which will be part of PDF 
2.0 exists but the spec is not publicly available. The first Adobe product to 
support this second implementation of AES 256 is Acrobat/Reader 10. The current 
commit only implements the first proposal.
                
> add support for AES 256 PDF encryption
> --------------------------------------
>
>                 Key: FOP-2248
>                 URL: https://issues.apache.org/jira/browse/FOP-2248
>             Project: Fop
>          Issue Type: New Feature
>            Reporter: Luis Bernardo
>            Priority: Minor
>
> AES 256 PDF encryption is described in PDF 1.7 Extension Level 3.

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