Adobe 22020737 Acrobat X Pro Manual - Page 266

USING ACROBAT X PRO 260 Digital signatures 2 Choose Tools > Sign & Certify and then select one of the following options. If you don't see the Sign & Certify panel, see the instructions for adding panels at "Task panes" on page 9. • With Visible Signature. • Without Visible Signature. If you choose this option, your signature appears only in the Signatures panel. 3 Click OK in the Save As Certified Document dialog box. If you are certifying with Visible signatures, you can place the signature in an existing signature field or create a field for the signature. Follow the directions in the prompts to choose a location. 4 If you're adding a visible signature, draw the signature field on the page. Note: If you enabled View Documents In Preview Document Mode When Signing in the Security Preferences, click Sign Document in the document message bar. 5 Follow the onscreen instructions to select a digital ID, if prompted. Specify a default ID to avoid being prompted each time you sign a PDF. 6 In the Certify Document dialog box, specify the permitted changes, type your password or PIN for your digital ID, and then click Sign. Note: Some digital IDs are configured to ask for a password or other user authentication after you click the Sign button. 7 Save the PDF using a different filename than the original file, and then close the document without making additional changes. It is a good idea to save it as a different file so that you can retain the original unsigned document. More Help topics "Specify the default digital ID" on page 240 "About digital signatures" on page 249 Timestamp a document Acrobat X provides users with the capability to add a document timestamp to a PDF without also requiring an identitybased signature. In this way, the authenticity and existence of a document at a particular time can be asserted. These timestamps are compliant with the timestamp and revocation features described in Part 4 of ETSI 102 778 PDF Advanced Electronic Signatures (PAdES) standard. Reader X users can also timestamp a document if the document includes appropriate Reader Enabling features. For more information on PAdES, see blogs.adobe.com/security/2009/09/eliminating_the_penone_step_at.html To place a document timestamp: 1 Open the document to which you want to add a timestamp. 2 Choose Tools > Sign & Certify > Time Stamp Document. If you don't see the Sign & Certify panel, see the instructions for adding panels at "Task panes" on page 9. 3 In the Choose Default Timestamp Server dialog box, select a default timestamp server from the list, or add a new default timestamp server. 4 Click Next, and then save the document with the timestamp. Last updated 10/11/2011