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How to Protect PDF Files by Setting Security Permissions

For example, to permit only the users that have a password to access the document and also to restrict their printing and copying capability, you can use the following parameter combination:
Parameter Value Description
pdf.security.owner.password <OWNER PASSWORD> People using this password will be able to open the document, with full permissions.
pdf.security.user.password <USER PASSWORD> People using this password will be able to open the document, but they will not be able to print.
pdf.security.restrict.print yes Restricts users from printing.
pdf.security.restrict.copy yes Restricts users from copying content.
Important: If you specify just the user password (without an owner password), then the people using it will be considered owners, and no restrictions will apply to them.