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Old 07-07-18, 09:31
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DavidNewton DavidNewton is offline
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Default PDF Security

My apologies if this has already been covered here but I couldn't find it.

This is sort of a take care tip.
If you want to secure a pdf online then do not allow it to be printed.

I was looking into ways of putting pdf files online so that they could be read but not altered. So I set a Permissions password and allowed printing for those who needed a hard copy and enabled text access for screen reader devices for the visually impaired and then tested the security. It did not take long to find out that allowing printing meant that setting security permissions were a waste of time.

David
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Old 08-07-18, 00:48
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Madeline Madeline is offline
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Default Re: PDF Security

Are any of these articles of any use?

Prevent Print - prevent printing from PDF files & Documents
and
DRM Software | Document Copy Protection & PDF Encryption control

How to prevent printing or copying PDF documents? [A-PDF.com]
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Old 08-07-18, 08:36
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Sneakybeaky Sneakybeaky is offline
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Default Re: PDF Security

https://www.locklizard.com/pdf-password-protection/

Quote:
There are many freely available PDF password removal programs that will easily remove Adobe password protection and that includes the document open password. Even applications like Google drive and Google chrome can be used to remove PDF passwords
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Old 08-07-18, 09:12
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DavidNewton DavidNewton is offline
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Default Re: PDF Security

Thank you both for the links, it is clear that what I was trying to do is effectively impossible and since it was a passing idea I am going to let it pass and spend no more time thinking about it.

Thanks again.


David
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Old 09-07-18, 01:37
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Madeline Madeline is offline
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Default Re: PDF Security

You're very welcome. It's a pity that it doesn't appear to be possible to prevent a PDF from being printed.
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Old 12-07-18, 10:15
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NikoBold NikoBold is offline
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Default Re: PDF Security

I'm struggling with the concept of unprintable pdf files in the first place as the restrictions are so very easy to remove.

My website (coming real soon now) has numerous pdf files which the target audience will most likely want to download and print. Of course the files on the site are not editable, except by me, but downloaded copies can be.
I plan to have have a text file of the MD5 and SHA-1 hash values of each pdf, plus instructions on how to generate them, on the site so that users can check the validity of the copies they have should they feel the need.

Nik
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