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https://issues.apache.org/jira/browse/PDFBOX-149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13869347#comment-13869347
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Ralf Hauser commented on PDFBOX-149:
------------------------------------

see also PDFBOX-1594 

> Update encryption algorithms
> ----------------------------
>
>                 Key: PDFBOX-149
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-149
>             Project: PDFBox
>          Issue Type: New Feature
>
> [imported from SourceForge]
> http://sourceforge.net/tracker/index.php?group_id=78314&atid=552835&aid=1465151
> Originally submitted by benlitchfield on 2006-04-05 10:05.
> PDF 1.6 has some new features and step numbers of the 
> algortithm need to be updated.
> For example Algorithm 3.2 Compute Encryption Key now 
> has 9 steps.  Specifically step 6 factors in 
> encryption of the metadata, which is currently not 
> implemented.
> Ben



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