Signing workbooks

After you have finalized an Add-In for Excel workbook, you can verify the workbook by signing it with a digital signature. A digital signature is an encrypted verification that confirms that the workbook originated from the signer and has not been altered since it was signed.

You cannot edit a signed workbook without first breaking the signature.

Sign a workbook

Note

Before signing a workbook you need to create or obtain a digital ID. For more information about digital IDs, see the Microsoft Excel documentation.

  1. Click the ACL Add-In tab.
  2. Select Sign Workbook and in the Purpose for signing this document text box, enter the purpose.
  3. Verify that the Signing as identity is correct and click Sign.

Remove a digital signature

  1. Click the ACL Add-In tab and if the Signature pane is not displayed in the worksheet, click File > Info > View Signatures.
  2. In the Signature pane, click the drop-down arrow next to the signature you want to remove.
  3. Click Remove Signature.
  4. Click Yes in the confirmation dialog box.