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How to protect a pdf file?

Updated: 12/8/2022
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Wiki User

11y ago

Best Answer

A PDF file can be protected in many ways. Some methods are most secure while others can be superficial.

The first choice for most people will be the use of Adobe's own solution known as Acrobat. With Adobe Acrobat a PDF can be protected using password and/or expiration. There are many other PDF creators that also offer password and expiry date protection and the user needs to beware of imitations because many PDF converters do not properly protect the PDF. To enforce any limitations on a document it needs to be encrypted to prevent normal viewers from ignoring the protection. So when it comes to general distribution most authors will want to use Adobe tools because they are more widely used.

But if your document requires bullet-proof protection you need to look at a more secure solution, one that your users cannot use other software to remove the protection. PDF protection and DRM are popular targets by nuisance developers and one only has to perform a web serach on "remove protection from PDF" to realise just how many apps are available for removing PDF protection and just how exploitable these so called "protect" solutions really are.

To further protect PDF an author may also want to prevent unauthorised sharing. Here DRM can be used to ensure that only the author assigned users can open a document. But as with password protection DRM can also be exploited, that is, unless you use a document solution that is designed for protection from end to end. Copysafe PDF is such a solution and by using its proprietary reader with DRM options you can distribute PDF documents by email, download and on disk with the most secure and unexploitable protection from all copy including screen capture.

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11y ago
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Anonymous

Lvl 1
3y ago

In MaiPDF, we are offering two ways of PDF sharing. Online and offline.

The way which online DRM means: Upload pdf files (with password or not) to MaiPDF site, and turning that file into a web link or an QR Code, and you can set up your own pdf DRM into that sharing link, you can add “the maximum open times allowed for this pdf file”, “the reading during for each time that file is open”. After that, you can track the result of read.

The way which mean by offine DRM is make your PDF file into a readable HTML file which compatible to all most all the modern browser, reader can open the files in browsers like Chrome Firefox, Edge etc. The offline file is like other expensive DRM supplier do, the file needs to be verified to a validation server through before it can be open.

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