How do I determine if a created PDF file has been encrypted on a linux or unix box

[SamIamIam]

I am unsure if running the file command on my box will tell me if a given, created PDF file is encrypted and with which level of encryption.  Is there a way to determine if the file is encrypted using Unix/Linux tools after the fact?

Thanks,

Sam

[Guest · Accepted solution]

It's assumed that you want to do this at the UNIX command line / Shell / Terminal.  There is a way that you could do this and it is to "roll your own" and build the tool with the Adobe PDF Library SDK.  Datalogics, who is an Adobe Partner has a UNIX port of the Adobe PDF Library SDK that could be used to create a tool that did this for you but there is a very large caveat involved in the price structure for the Adobe PDF Library.

http://www.datalogics.com/products/pdf/pdflibrary/