[Gllug] Encrypted PDF

[Richard Jones]

This is an encrypted PDF file:

http://www.annexia.org/tmp/patent.pdf

(Yes, it's actually a software patent which I was partly responsible
for .. hiss boo!)

evince (GNOME PDF reader) claims the document is encrypted and
requires a password which I don't know.  xpdf displays page 1 but it
seems that pages 2-81 are all blank.  Presumably they're the encrypted
pages.

Does anyone know if it's possible to crack PDF encryption?  Is it a
non-serious obfuscation like the passwords on Office documents, or is
it proper encryption?

Rich.

-- 
Richard Jones, CTO Merjis Ltd.
Merjis - web marketing and technology - http://merjis.com
Team Notepad - intranets and extranets for business - http://team-notepad.com
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