Signing Pdfs - Adobe READER 8 User Manual

Add a time stamp to signatures
You can include the date and time you signed the document as part of your signature. Like signatures, time stamps
are easier to verify when they're associated with a time stamp authority's trusted certificate. Including a timestamp
helps to prove that the document wasn't changed after you signed it and reduces the chances of an invalid signature.
You can obtain a time stamp from a third-party time stamp authority or from the certificate authority that issued
your digital ID.
Time stamps appear in the signature field and in the Signature Properties dialog box. If a time stamp server is
configured, that time stamp appears on the Date/Time tab of the Signature Properties dialog box. If no time stamp
server is configured, the signatures field displays the local time of the computer at the moment of signing.
Configure a time stamp server
To configure a time stamp server, you need the server name and URL or a Forms Data Format (FDF) file that
contains the server settings.
Choose Document > Security Settings.
1
2 Select Time Stamp Servers on the left.
Do one of the following:
3
•
If you have an FDF file with the time server settings, click the Import button
•
If you have a URL for the time server, click the New button
whether the server requires a user name and password, and then click OK.
Set a time stamp server as the default
If you have two or more time stamp servers configured, you can set one of them as the default.
Note: Before you set a time stamp server as the default, you may want to check if the time stamp authorities charge a
usage fee.
Choose Document > Security Settings.
1
Select the time stamp server, and click the Set Default button
2
Click OK to confirm your selection.
3
About graphics tablet signatures
You can sign PDFs using graphics tablets and other input devices by using third-party software. Digital signature
providers, such as Silanis and the Communication Intelligence Corporation (CIC), provide this capability in an
Acrobat supported plug-in. These plug-ins may limit your access of certain encryption features in Acrobat. For more
information about third-party providers, visit the Adobe website.

Signing PDFs

Before you sign a PDF
You can expedite the signing process and optimize your results by making the following preparations in advance:
•
Obtain a digital ID, or create a self-signed digital ID in Reader.
•
Set the default signing method.
. Select the FDF file, and click Open.
. Type a name and then type the server URL. Specify
.
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