11.2.1 for Windows

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Chapter 11: Signature User Manual
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To add a time stamp to documents
➢ Before adding a time stamp to documents, you need to configure a default time
stamp server. Click Protect > Time Stamp Document and create a timestamp
server by clicking New… in the pop-up dialog box. Specify the server name and
complete other settings of the server on demand. Click OK.
➢ Select the created server and click Set Default to set the server as the default time
stamp server. Click Next to continue.
(Tip: You can also create, edit, and delete time stamp servers as well as enable/disable
the default time server in File > Preferences > Time Stamp Servers. To disable the
default time stamp server, select the default time stamp server and click Clear.)
➢ Specify a name and location for the signed document. Click Save.
Trusted Certificates
When you validate or view properties of a digital signature or an embedded
timestamp, the validity status may display “unknown” or “could not be verified”. You
need to add the certificate that issued your digital IDs as well as the time stamp server
to the Trusted Certificates list.
To add a trusted digital certificate to the Trust Certificates list, please do the following:
Right-click the digital signature, and choose Show Signature Properties.
In the Signature Properties dialog box, click Show Certificate.
In the Certificate Viewer dialog box, specify the trust level for the certificate in
the Trust tab:
 Use this certificate as a trusted root: Use the certificate as a trusted root, and
trust all certificates issued by that certificate authority. Once you make a
certificate a trust anchor, revocation checking will not be performed on it.
 Validating Signatures or Validating Certified Documents: Trust the certificate
when validating signatures or certified documents.
Click Add to Trusted Certificates, and confirm your operation.
To add a trusted time stamp server to the Trusted Certificates list, please do either of
the following:
If a time stamp is added in the document, go to the Digital Signatures panel in
the navigation pane, right-click the timestamp signature, and choose Show
Signature Properties. In the pop-up Signature Properties dialog box, click Show
Certificate. See also Add a trusted digital certificate to the Trust Certificates list.
If a time stamp is added to a digital signature, right-click the signature field in the