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https://issues.apache.org/jira/browse/PDFBOX-2456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14195125#comment-14195125
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Tilman Hausherr commented on PDFBOX-2456:
-----------------------------------------
Yes the previous solution has a risk, there is a /U as "number format
dictionary".
> create TestSymmetricKeyEncryption.java
> --------------------------------------
>
> Key: PDFBOX-2456
> URL: https://issues.apache.org/jira/browse/PDFBOX-2456
> Project: PDFBox
> Issue Type: Improvement
> Components: Utilities
> Affects Versions: 2.0.0
> Environment: java7 debian7
> Reporter: Ralf Hauser
> Labels: AES256
> Fix For: 2.0.0
>
> Attachments: TestSymmetricKeyEncryption.java, aes256.diff,
> enc128bit_20141025_115145.pdf, enc256bit_20141025_105451.pdf,
> preEnc_20141025_105451.pdf, preEnc_20141025_115145.pdf
>
>
> similarly to org.apache.pdfbox.encryption.TestPublicKeyEncryption, also test
> password based encryption
> 1) 128bit
> 2) 256bit AES PDFBOX-1594
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