How do digital signatures work?

<p data-end=”5614″ data-start=”5350″>Organizations use digital signatures when an agreement needs more than convenience. They use them when a workflow requires <a href=”https://www.techtarget.com/searchcontentmanagement/answer/E-signature-vs-digital-signature-Whats-the-difference”>stronger signer verification</a>, tamper evidence and a better evidentiary trail than a basic electronic signature provides.</p>
<p data-end=”5871″ data-start=”5616″>That distinction matters because not every document needs the same level of trust. Routine approvals may only need a simple e-signature, while regulated, high-value or dispute-sensitive transactions often benefit from certificate-based digital signatures.</p>
<p data-end=”6126″ data-start=”5873″>In practice, the goal is to match the signing method to the risk. The right question is not whether a business can sign electronically. It is whether the transaction needs stronger identity assurance, document integrity controls and compliance support.</p>
<section class=”section main-article-chapter” data-menu-title=”Digital signatures vs. e-signatures”>
<h2 class=”section-title”><i class=”icon” data-icon=”1″></i>Digital signatures vs. e-signatures</h2>
<p>Organizations must understand the <a href=”https://www.techtarget.com/searchcontentmanagement/answer/E-signature-vs-digital-signature-Whats-the-difference”>difference between digital signatures and e-signatures</a> so they can implement a level of security that meets their needs.</p>
<p>An e-signature is a broad term that includes any signature a user sends electronically. Some e-signatures, such as those retail stores use for small transactions, don’t require identity verification. However, other types, such as digital signatures, involve a strict authentication process.</p>
<p>In the U.S., the E-SIGN Act gives <a href=”https://www.techtarget.com/searchcontentmanagement/answer/Are-electronic-signatures-legally-binding”>electronic signatures legal standing </a>when key conditions are met, but organizations still use digital signatures when they need stronger identity assurance and tamper evidence. In the EU, trust-service frameworks make those assurance levels even more explicit.</p>
<p>Digital signatures rely on <a href=”https://www.techtarget.com/searchsecurity/definition/public-key”>public key cryptography</a> and <a href=”https://www.techtarget.com/searchsecurity/definition/public-key-certificate”>digital certificates</a> to verify authenticity and detect tampering. In a typical workflow, the system creates a hash of the document and signs that hash with the sender’s private key. The recipient then uses the corresponding public key and certificate to verify the signature and confirm that the document has not been altered since it was signed.</p>
<p>To create a digital signature, organizations typically use an<a href=”https://www.techtarget.com/searchcontentmanagement/tip/Top-e-signature-software-providers”> e-signature system</a>. E-signature systems offer digital signature capabilities, but they can also streamline workflows. For example, they can send reminder notifications to late signatories and assign roles to specific individuals.</p>
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<h3 class=”splash-heading”>When to use a digital signature instead of a basic e-signature</h3>
<p>Use a basic e-signature when speed and convenience are the priority and the workflow does not require higher assurance. Use a digital signature when the organization needs certificate-backed signer verification, tamper evidence and a stronger audit trail. In practice, the choice depends on transaction risk, compliance requirements and the evidentiary burden if the agreement is challenged later.</p>
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<section class=”section main-article-chapter” data-menu-title=”What are digital signatures used for?”>
<h2 class=”section-title”><i class=”icon” data-icon=”1″></i>What are digital signatures used for?</h2>
<p>Organizations can use digital signatures anywhere a signature is required, but they usually reserve them for transactions where stronger trust, signer verification and document integrity matter most. Common examples include the following:</p>
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<li>Real estate purchase and sale agreements</li>
<li>Sales contracts</li>
<li>Insurance agreements</li>
<li>Tax documents and forms</li>
<li>Construction change orders</li>
<li>Clinical trials</li>
<li>Loans</li>
<li>Mortgages</li>
<li>Leases</li>
</ul>
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