Using Help
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205
Adobe Acrobat Help
Digitally Signing PDF Files
Using Help
|
Contents
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Index
Back
205
Getting information on signatures
You can open a dialog box to view an explanation of a signature’s verification status, the
document version the signature applies to, and information such as date and time of the
signing. This dialog box is not editable, but you can copy text from it and click buttons to
work with the signature.
To get information on a signature:
1
Select the signature in the Signatures palette, and choose Properties from the Signa-
tures palette menu. Or right-click (Windows) or Control-click (Mac OS) the signature in the
palette or document pane, and choose Properties from the context menu.
2
In the Signature Properties dialog box, do any of the following:
•
To verify the signature, click Verify Signature.This also updates information in the dialog
box.
•
To view user attributes, verification parameters, and other information on the
signature’s certificate, click Show Certificate. (See
“Getting information on certificates”
on page 206
.) This button is available only if the signature has been verified.
3
Click Close.
Viewing earlier versions of a signed document
If a document is signed more than once, Acrobat maintains all of the signed versions in a
single Adobe PDF file. After the first time a document is signed, and each time the
document is signed, a version is saved as append-only to ensure that it will not be altered.
All signatures and the versions of the document corresponding to those signatures are
listed in the Signatures palette.
To open an earlier signed version:
Select the signature in the Signatures palette, and choose View Signed Version from the
Signatures palette menu. Or right-click (Windows) or Control-click (Mac OS) the signature
in the palette or document pane, and choose View Signed Version from the context menu.
The earlier version opens in a new Adobe PDF file, with the version information and the
name of the signer in the title bar.
To compare two versions of a signed document:
For information on comparing two versions of a signed document, see
“Comparing two
PDF documents” on page 123
.
Managing user certificates
Your user certificate contains a public key that is used to verify your digital signature.
Before other users can verify your signature on documents they receive, they must have
access to your user certificate.You should build a list of user certificates that you use often.
Sharing your user certificate
You can share your user certificate with others by exporting your certificate (as an FDF file)
to a key file or by e-mailing your certificate directly. Users can also import your user certif-
icate from verified signatures in a document.