Adobe Acrobat XI - Manual (Page 406)

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Electronic signatures
Last updated 1/14/2015
Compare versions of a signed document
After a document is signed, you can display a list of the changes made to the document after the last version.
1 In the Signatures panel, select the signature.
2 Choose Compare Signed Version To Current Version from the Option menu .
3 When you’re done, close the temporary document.
Trust a signer’s certificate
Trusting a certificate involves adding it to the user’s trusted identity list in the Trusted Identity Manager and manually
setting its trust level. End users often exchange certificates as needed when using certificate security. Alternatively, they
add certificates directly from signatures in signed documents and then set trust levels. However, enterprises often
require employees to validate the signatures of others without performing any manual task. Acrobat trusts all
certificates for signing and certifying that chain up to a trust anchor. Therefore, administrators should preconfigure
client installations or let their end users add a trust anchor or anchors. For more information on trusting certificates,
see
About certificate-based signatures .
PDF Portfolios and digital signatures
You can sign component PDFs within a PDF Portfolio, or sign the PDF Portfolio as a whole. Signing a component PDF
locks the PDF for editing and secures its content. After signing all the component PDFs, you can sign the entire PDF
Portfolio to finalize it. Alternatively, you can sign the PDF Portfolio as a whole to lock the content of all component
PDFs simultaneously.
• To sign a component PDF, see Signing PDFs with Adobe EchoSign Electronic Signature . The signed PDF is
automatically saved to the PDF Portfolio.
• To sign a PDF Portfolio as a whole, sign the cover sheet (View > Portfolio > Cover Sheet). Once you sign the PDF
Portfolio as a whole, you cannot add signatures to the component documents. However, you can add more
signatures to the cover sheet.
Digital signatures on attachments to component PDFs
You can add signatures to attachments before signing the cover sheet. To apply signatures to attached PDFs, open the
PDF in a separate window. Right-click the attachment, and choose Open File from the context menu. To view
signatures on the PDF Portfolio, navigate to the cover sheet to view the document message bar and signatures pane.
Signed and certified PDF Portfolios
A properly signed or certified PDF Portfolio has one or more signatures that approve or certify the PDF Portfolio. The
most significant signature appears in a Signature Badge in the toolbar. Details of all signatures appear in the cover sheet.
• To view the name of the organization or person that signed the PDF Portfolio, hover the pointer over the Signature
Badge.
• To view details about the signature that appears in the Signature Badge, click the Signature Badge. The cover sheet
and the Signatures pane on the left open with details.