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https://issues.apache.org/jira/browse/PDFBOX-1594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13944379#comment-13944379
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Manuel Kasper commented on PDFBOX-1594:
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Thanks for the commit!
I did not touch that code (other than changing the indent by wrapping it in an
if {}) – looks like it's been there for years. Not sure why it's adding
this.toString() to the hash though. The intention seems to be to simply
generate a "random" document ID by hashing a couple of values, so I don't see
any harm in it.
> Add support for AES256 Encryption
> ----------------------------------
>
> Key: PDFBOX-1594
> URL: https://issues.apache.org/jira/browse/PDFBOX-1594
> Project: PDFBox
> Issue Type: Improvement
> Reporter: Maruan Sahyoun
> Assignee: John Hewson
> Fix For: 2.0.0
>
> Attachments: fix-pdfbox-2.0.0-encrypt.diff, pdfbox-1.8.4-aes256.diff,
> pdfbox-2.0.0-r1580297-aes256.diff
>
>
> Adobe 9 added support for AES 256 encryption. Further information is
> available at
> http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/adobe_supplement_iso32000.pdf
> (specially 3.5.1) or ISO 32000-2.
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