Microsoft Office PowerPoint 2007 On Demand

PP07S-4.2.1

After you've finished a presentation, you might consider adding a digital signaturean electronic, secure stamp of authentication on a document. Before you can add a digital signature, you need to get a digital ID, or digital certificate, which provides an electronic way to prove your identity, like a drivers license. A digital certificate checks a public key to validate a private key associated with a digital signature. To assure a digital signature is authentic, it must have a valid (non expired or revoked) certificate issued by a reputable certification authority (CA), and the signing person must be from a trusted publisher. If you need a verified authenticate digital certificate, you can obtain one from a trusted Microsoft partner CA. If you don't need a verified digital certificate, you can create one of your own. If someone modifies the file, the digital signature is removed and revoked. If you're not sure if a presentation is digitally signed, you can use the Signatures task pane to view or remove valid signatures.

Create an Digital ID

Click the Office button, point to Prepare, and then click Add a Digital Signature.

If an alert message appears, click Signature Services from the Office Marketplace to open an informational Web site where you can sign up for a digital certificate, or click OK to create your own.

If you don't want to see this dialog box again, select the Don't show this message again check box.

If necessary, click OK and verify your Rights Management account credentials using your .NET password.

If you don't have a digital ID, click the option to get an ID from a Microsoft Partner or create your own, and then click OK.

Enter your name, e-mail address, organization name, and geographic location.

Click Create.

You can sign a document, or click Cancel.

Add a Digital Signature to a Document

Click the Office button, point to Prepare, and then click Add a Digital Signature.

To change the digital signature, click Change, select the one you want, and then click OK.

Enter the purpose for signing this document.

Click Sign.

If necessary, click OK.

View or Remove Signatures

Click the Signature icon on the Status bar.

The Signatures task pane appears, displaying valid signatures in the presentation. Invalid signatures are no longer automatically removed (New!).

Point to a signature, and then click the list arrow.

To see signature details, click Signature Details, select a signature, click View, click OK when you're done, and then click Close.

To remove a signature, point to a signature, click the list arrow, click Remove Signature, click Yes, and then if necessary click OK.

Click the Close button on the task pane.