Security Controls
You can add passwords to PDF files you create in the Create Assistant or integrated applications and prohibit or allow actions, such as printing, extracting content, and editing.
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Select a security profile on the left, and edit on the right. Click OK to save changes.
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Click New to name a new standard security control.
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Click Delete to remove a security control.
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Click Default to return supplied controls to default values and remove user-defined controls.
Set up the PDF security based on the selected encryption.
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Encryption Strength: Select the encryption level.
The following options display regardless of the selected Encryption Strength:
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Require password to open the document: Select this setting to enable the Open Password text box. Enter the password to require for opening the document. Use an open password (sometimes called a user password) to view PDF files. Further use of such a PDF depends on which permissions are set.
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Use a password to restrict printing, editing, and modifying security settings of the document: Select this setting to enable the Permissions Password text box. Enter the password to require for altering the document. Use a permissions password (sometimes called a master or owner password) to view and use a PDF freely, regardless of permissions settings. You can also modify, remove or add permissions settings. Before setting permissions, you must supply and confirm a permissions password and specify the encryption strength: 40-bit, or 128-bit. Encryption strength determines which permissions are available.
The following options may depend on the actual Encryption Selection.
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If you selected 40-bit (standard), you may simply select any of the following settings to block respective functionality:
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Prevent Printing
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Prevent Copying or Extracting
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Prevent Annotating and Editing Form Fields
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Prevent Altering the Document
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If you selected 128-bit, then more sophisticated security options appear:
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Allow Content Access for Visually Impaired: This setting is selected by default. It is enabled only if the "Allow Content Copying and Extraction" setting below is selected.
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Allow Content Copying and Extraction: This setting is enabled only if the Permissions Password is specified.
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Changes: Select the level of changes to grant with the Permissions Password.
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Printing: Select the level of printing to grant with the Permissions Password.
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Be sure to note the passwords you assign; without them you cannot reopen PDF files that you create. Successful PDF protection depends on good password management.
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Not all PDF versions support encryption above 40-bits. See About PDF Versions.
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PDF Create usually creates standard PDF files that can be viewed, printed, searched and modified in a PDF editor. If some actions are prohibited and a user cannot supply the correct permissions password, the PDF may appear as image-only.