Operation Manual

Figure 295: Setting a password to encrypt a PDF
Digital Signatures page of PDF Options dialog
This page contains the options related to exporting to a digitally signed PDF.
Digital signatures are used to ensure that the PDF was really created by the original author (that is,
you), and that the document has not been modified since it was signed.
The signed PDF export uses the keys and X.509 certificates already stored in your default key
store location or on a smartcard. The key store to be used can be selected under Tools > Options
> LibreOffice > Security > Certificate Path. When using a smartcard, it must already be
configured for use by your key store. This is usually done during installation of the smartcard
software. Details about using these features is outside the scope of this chapter.
• Use this certificate to digitally sign PDF documents: Click Select to open the Select
Certificate dialog, where all certificates found in your selected key store are displayed. If the
key store is protected by a password, you are prompted for it. When using a smartcard that
is protected by a PIN, you are also prompted for that.
Select the certificate to use for digitally signing the exported PDF, then click OK.
All other fields on the Digital Signatures tab are accessible only after a certificate has been
selected.
• Certificate password: Enter the password used for protecting the private key associated
with the selected certificate. Usually this is the key store password. If the key store
password has already been entered in the Select Certificate dialog, the key store may
already be unlocked and not require the password again.
Chapter 10 Printing, Exporting, E-mailing | 305