An enumeration value that represents the PDF document resources to encrypt. You can
encrypt the entire PDF document, everything except for the document's metadata, or just
the document's attachments. This enumeration value is passed to the
CertificateEncryptionOptionSpec object's setOption method.
To see this enumeration value used in a code example,
see the Encrypting a PDF document with a certificate using the Java API quick start in
Programming with Adobe Experience Manager forms.