Foxit PhantomPDF Standard
The advantage of securing documents with certificates is that authors can specify unique
permissions for each person. For example, authors can permit a person to fill in forms and
comment in document, and permit another person to edit text or delete pages. You can choose
certificates from files on disk, or from the Windows certificate store. Only a specific set of users
whose identities can be verified and managed can have access to the document. A certificate that
contains public key and other identifying information is used to encrypt documents, or verified a
digital signature. Only corresponding private key decrypts the document that was encrypting
using the certificate.
Generally, if possible, encrypt documents using certificates from third-party provider. If the
certificate is lost or stolen, the issuing authority can replace it, if a self-signed certificate is
deleted, all PDF encrypted using the certificate is forever in accessible.
Add a certificate security
Choose PROTECT > Secure Document > Certificate Protect.
In Certificate Protection dialog box, create intended recipient list for the encrypt document：
Click New ID to create and store your self-signed digital ID in:
New PKCS#12 digital ID file – Stores the digital ID information to a file with the
extension .pfx on Windows and .p12 on Mac OS. You can use the files interchangeably
across different operating systems.
Windows Certificate Store – Stores the digital ID to a common location. Other Windows
applications can also retrieve it.
Click Import to import certificate from Windows Certificate store.
Click Browse to import certificate from disk.
Click Remove to delete a recipient from recipient list.
Click Permission to set document restriction for the selected recipient. About
Permission options, please refer to ͞Add document restrictions͟ of Password security
Select Encryption Algorithm (support 128-bit AES, 256-bit AES and128 bit ARC-FOUR.
Check Don’t Encrypt metadata to encrypt the documents except metadata.
(Optional) Check Save the settings as a new policy to save the current security settings as a
policy so that you can apply it to other documents.
Click OK and save the document.
See also ͞About digital ID͟