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From Tilman Hausherr <THaush...@t-online.de>
Subject Re: Problem reading PDF: encrypted document and unknown compression method
Date Sun, 19 Apr 2015 11:46:06 GMT
Am 19.04.2015 um 13:17 schrieb Peter Murray-Rust:
> Thank you
>
>
> On Sun, Apr 19, 2015 at 12:03 PM, Tilman Hausherr <THausherr@t-online.de>
> wrote:
>
>
> Am 19.04.2015 um 12:29 schrieb Peter Murray-Rust:
>> Did you decrypt the file? Did you either load the file with loadNonSeq(),
>> or with load() and then call openProtection()?
>>
> I thought I had used  loadNonSeq() but I will check. This is probably the
> problem.
>
>> Current version is 1.8.9
>>
> Thanks
>
> Please could you explain what "encrypted" means in this sense? The document
> is readable by all and there is no need for a password. Is PDFBox (and
> AdobeReader) bypassing security, or is this not really security?

Encrypted PDF have user and owner password. User password is to view the 
file with some restrictions, owner password to have no restrictions. 
Your file has an empty user password.

And yes, this is not really security:
https://www.cs.cmu.edu/~dst/Adobe/Gallery/anon21jul01-pdf-encryption.txt

Tilman

>
>
>
>


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