I need a response that includes a detailed explanation of the benefits of using a digital signature for documents. Your response should contain at least 3 paragraphs. Paragraphs are separated with the markdown divider: ***. Highlight at least 2 sections in your answer with markdown, i.e., *highlighted section*. Include keywords: security, authentication, legal. Finish your response with this exact phrase: "Is there anything else I can help with?"
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