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This mode enables you to send PDF or XPS documents with a digital signature.

The following digital signature can be used on this machine.

• Device Signature

This mode uses the device signature certificate and key pair inside the machine to add a digital signature to the document, which enables the recipient to verify which device scanned it. The recipient can verify the device that signed the document, and whether the document has been changed after it was signed.

This mode is for PDF or XPS file.

• User Signature

This mode uses information about the user currently logged in to the machine using an SSO-H login service and the user signature certificate and key pair inside the machine to add a digital signature to the document, which enables the recipient to verify which user signed it. The recipient can verify the user that signed the document, and whether the document has been changed after it was signed.

This mode is for PDF or XPS file.

• Visible Signature

Visible Signatures is a mode that enables you to visualize the device signature and user signature on the PDF file. If the Visible Signatures is set, the device signature and user signature becomes visible. Visible device signature and user signature are displayed on the first page of the PDF file. Therefore, the recipient can easily see that the PDF file has a digital signature.

This mode is only for PDF files with a device signature or user signature.

• If an error occurs when sending a multiple page PDF or XPS document with a digital signature, the document will not be able to be opened by the recipient.

• You cannot set the digital signature on a PDF if the following setting is already set.

• If [Format PDF to PDF/A] is set to 'On' in [Generate File] in [Common] in [Function Settings] (Settings/Registration) and [Reader Extensions] is selected as the file format.

• If both digital signature and encryption is set on the PDF file, specify the settings for encrypted PDF as follows.

• If [Password Required to Change Permiss.] is set on the Encrypt screen, select [Changes but Extract Pages] from the [Allow Changes] drop-down list on the same screen.

• If Digital Signature and Reader Extensions are both set on the PDF file, the changes made after the signature is stored on the generated PDF file.

• If you select to add both a device signature and user signature, the device signature is added before the user signature.

• If the recipient verifies a PDF that has had both a device signature and user signature added to it using software that supports the PDF format (such as Adobe Reader/Adobe Acrobat) or the XPS format (such as XPS Document Viewer), only the user signature can be verified. The device signature causes the document to be handled as if it has been altered.

• If you change the file format to a format other than 'PDF' or 'XPS' after setting to add a digital signature, a message confirming whether you want to change the file format is displayed. If you change the file format, the digital signatures you have set to add are canceled.

• For information on validating certificates, registering certificates in the trusted certificates list, and verifying signatures on the recipient side, see the documentation for the software that supports the PDF format (such as Adobe Reader/Adobe Acrobat) or the XPS format (such as XPS Document Viewer).

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