Understanding Digital Signatures
A digital signature is a way to verify the authorship of content or to protect a document from changes by unauthorized authors. They’re more and more commonly used in any content that contains code, as a way to help reassure the user of the integrity of the content.
You can set up a digital signature directly in the 2007 Office release programs. However, that signature will only be verifiable on your own computer, and it applies to the document rather than to the code. So, for example, you might want to do this if sending a document for review. Once edits are made to a document after you sign it, the signature becomes invalid and needs to be reapplied. So, if the document comes back to you with an invalid signature, ...
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