Data that binds a sender's identity to the information being sent. A digital signature may be bundled with any message, file, or other digitally encoded information, or transmitted separately. Digital signatures are used in public key environments and provide authentication and integrity services.
Your signature is more than # lines long. You should shorten it to match the widely accepted limit of # lines. Do you want to re-edit the article or send it anyway?
Check this option if you want this message part to be signed; the signature will be made with the key that you associated with the currently-selected identity