Add a certificate security

1. Choose Protect > Secure Document > Certificate Protect.
2. 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 a certificate from Windows Certificate store.
• Click Browse to import a 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 restrictions” of Password security options.

3. Select Encryption Algorithm (support 128-bit AES, 256-bit AES and128 bit ARC-FOUR.
4. Check Don’t Encrypt metadata to encrypt the documents except metadata.
5. (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.
6. Click OK and save the document.

See also “About digital ID”