A PDF document can be encoded to protect the content from unauthorized access. A user may set the following parameters of encryption. The Document Security is a set of parameters with which you can protect documents from unauthorized access to them:

In the field User Password, specify the password required to open the document. If you set the password, access to the opening file is limited and will occur only if you specify the correct password. If no password is specified, i.e. the field is left blank, then the file may be opened without restrictions.

In the field Owner Password, specify the owner password to access the file. If you specify a password, access to the file operations, such as printing, copying etc will be available only after entering a password. If no password is specified, i.e., the field is left blank, the file operations will be available without restriction.

The flag Allow Print Document enables/disables the restricted access to the printing operation. If this option is disabled, specifying the owner password is required to perform this operation. If enabled, then printing will be available for everyone who opens the document.

The flag Allow Modify Contents enables/disables access to editing the text in the report. If this option is disabled, specifying the owner password is required to perform this operation. If enabled, then editing will be available for everyone who opens the document.

The flag Allow Copy Text and Graphics enables/disables access to copying the information. If this option is disabled, specifying the owner password is required to perform this operation. If enabled, then copying will be available for everyone who opens the document.

The flag Allow Add or Modify Text Annotations enables limited access to work with the annotations in the document. If this option is disabled, specifying the owner password is required to perform this operation. If enabled, then this operation will be available for everyone who opens the document.

The flag Encryption Key Length allows selecting the length of the encryption key. The longer the length is, the more difficult is to decrypt the document, and, therefore, the safety of the document is higher.