How to Secure PDFs Against Third-Party Apps in Adobe Acrobat DC
Question details
The user is considering purchasing Adobe Acrobat DC but wants to know if third-party applications can bypass PDF security to edit or access text and digital images.
- Product
- Adobe Acrobat DC
- Device & OS
- not provided
- Scenario
- Evaluating PDF software for secure document distribution.
- Observed behavior
- Concerns that PDF security features might be ignored by some third-party applications, leading to unauthorized access or editing.
Before applying strict security settings and encryption, ensure you have a backup of your original unprotected PDF, as losing the permissions password will permanently lock you out from modifying the document's security settings.
Apply Strong Encryption and Permission Passwords
The most effective way to prevent unauthorized apps from modifying your PDF is to use high-level encryption combined with a permissions password.
While standard document restrictions might be ignored by non-compliant third-party PDF readers, applying AES encryption physically encrypts the document data. Without the correct password, the text and images cannot be extracted, modified, or bypassed by any third-party software.
Open your PDF in Adobe Acrobat DC and select the 'Protect' tool from the right-hand tool pane.
Click on 'Advanced Options' in the top toolbar and choose 'Encrypt with Password' from the dropdown menu.
Under the 'Permissions' section, check the box labeled 'Restrict editing and printing of the document' and enter a strong Permissions Password.
Set the 'Printing Allowed' and 'Changes Allowed' drop-downs to 'None'. Ensure the 'Enable copying of text, images, and other content' option is strictly unchecked.
Click 'OK' to confirm the password, then save the document to apply the encryption algorithms to your PDF file.
Flatten the PDF Before Distribution
Flattening a PDF converts text and interactive elements into a single background image layer, making it much harder for third-party apps to easily edit the content.
Secure Your PDFs Effectively with WPS PDF
WPS Office provides robust PDF editing and security features, allowing you to easily apply strict encryption and restrict unauthorized editing or copying of your PDF content without needing expensive software.
- 1. Open your PDF: Launch WPS Office and open the PDF document you want to secure.
- 2. Navigate to the Protect tab: Click on the 'Protect' tab located on the top ribbon menu.
- 3. Open encryption settings: Click on the 'Encrypt' button to open the document security dialog box.
- 4. Set editing restrictions: Check the box for 'Set Password for Editing and Extracting', input a strong password, and ensure 'Allow Copying' is unchecked.
- 5. Save the document: Click 'Confirm' and save your file to enforce the security restrictions.
Frequently Asked Questions
Can third-party PDF readers ignore Adobe Acrobat's permission settings?
Yes, standard permission settings are essentially metadata flags that instruct the PDF viewer on what is allowed. Some unauthorized or open-source third-party applications may ignore these rules. However, strong AES encryption applied alongside the password physically scrambles the data and cannot be bypassed.
What is the difference between a Document Open Password and a Permissions Password?
A Document Open Password requires a user to enter a password just to open and view the PDF. A Permissions Password allows anyone to open and view the PDF but restricts specific actions like editing, printing, or copying the text and images.
If I secure a PDF, can search engines still index the text?
It depends on your security settings. If you disable text copying and use strict encryption, search engines generally cannot extract and index the content. Some software allows a specific exception to enable text access for screen reader devices for accessibility purposes.
