You can use the encryption service to protect XML data
in XFA forms. You can encrypt the entire XML from the root node,
or provide an XPath expression that points to the exact node or
tag to be encrypted. To decrypt the document, the user must have
a private key that can be used to unlock the content in a PDF document.
You must know the user credential of the person for whom the XML is
encrypted, and must provide the same credentials to the Encryption
service. The Encryption services looks up the Truststore, where
user credentials are private keys are paired and stored.
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