I added protection to my document, but PDF Password remover v4.0 removed it. How do I protect a document effectively?

Forum|Forum|10 years ago
March 2, 2016
4 replies
1678 views

I'm trying to effectively protect my document. I restricted all permissions but printing and added a password. However, the first free program I tried removed the password and protection. How do I effectively protect the document?

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T

Test Screen Name

Legend

Don't forget JS can be turned off and support in non-Adobe products is potluck.

B

Brian3_14

Participating Frequently

Is there a way via javascript to test if a PDF is secured and what the password is?

Even if the security is stripped, couldn't you hide pages on doc open if there is no password or if the password was wrong?

As a bad example:

if (testForPassword == "12345"){

page1.presence = "visible";

}

else {

page1.presence = "hidden";

}

try67

Community Expert

Is there a way via javascript to test if a PDF is secured

Yes, using the securityHandler property of the Document object.

and what the password is?

Of course not, that would defeat the entire purpose of the security policy.

However, I don't see how any of this will help you... If someone removes the security policy they can also easily disable JS.

Short of using DRM protection there's no real secure way to encrypt a PDF file, I'm afraid.

B

Brian3_14

Participating Frequently

Thanks for the quick comments; should have been more clear.

1) In my case, the PDF is xfa (so only going to work on Adobe - this is acceptable) and if javascript is off, purpose of the PDF becomes severely limited. Needs to be on.

2) Good point, try67. Guess goal would be to trigger a message box on open, which would trigger the doc close event after clicking 'okay.'

Any examples of using the securityHandler property of the Document object?

B