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Add password (Encrypt)
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Owner Password
Restricts what can be done with the document once it is opened (Not supported by all readers)
User Password
Restricts the opening of the document itself
Encryption Key Length
40
128
256
Higher values are stronger, but lower values have better compatibility.
Permissions to set (Recommended to be used along with Owner password)
Prevent assembly of document
Prevent content extraction
Prevent extraction for accessibility
Prevent filling in form
Prevent modification
Prevent annotation modification
Prevent printing
Prevent printing different formats
Encrypt