pdftk 2.0-1 which is now in Ubuntu Saucy supports AES encryption.
** Changed in: pdftk (Ubuntu)
Status: New = Fix Released
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https://bugs.launchpad.net/bugs/1191381
Title:
pdftk
** Summary changed:
- pdftk password decryption doesn't work
+ pdftk password decryption doesn't work [missing AES support]
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https://bugs.launchpad.net/bugs/1191381
Title:
pdftk
Thanks for the information. Your pdf file is probably encrypted with AES
(supported since PDF 1.6) which is (still) not yet supported in pdftk.
The real bug is that pdftk does not detect, that it does not support it.
To circumvent the problem, you can open it with a viewer and print it
into a new
