Digital Signature vs Electronic Signature: What’s the Difference?

The short answer on digital signature vs electronic signature: an electronic signature is any electronic mark you use to show that you intend to sign, such as a typed name, a drawn signature or a click on “I agree.” A digital signature is a specific kind of electronic signature that uses a certificate and cryptography to prove who signed and that nobody changed the document afterward.

So every digital signature is an electronic signature, but most electronic signatures are not digital signatures. The difference matters when a document must hold up to scrutiny, travel between organizations or meet a regulator’s rules.

	Electronic signature	Digital signature
What it is	A sound, symbol or process that shows intent to sign	A cryptographic seal created with a private key and a certificate
Proves who signed	Only through the platform’s records (email, login, audit trail)	Yes – the certificate names the signer, verified by a certificate authority
Detects changes	Not by itself	Yes – any edit after signing breaks the signature
Verifiable without the platform	Usually not	Yes – in Adobe Acrobat or Reader, for example
Typical use	Everyday agreements, HR forms, sales contracts	Regulated documents, cross-company contracts, official forms

Is an electronic signature the same as a digital signature?

No. An electronic signature records your intent to sign; a digital signature is certificate-based cryptographic proof of who signed and of the document’s integrity.

US federal law defines an electronic signature broadly: an electronic sound, symbol or process attached to or logically associated with a record and adopted with the intent to sign it. That covers a typed name in an email as much as a signature drawn on a tablet. Nothing in that definition requires identity checks or tamper protection.

A digital signature works differently. Your signing software calculates a hash (a short fingerprint of the file) and encrypts it with your private key. Anyone can check it with the public key in your certificate. Because a certificate authority (CA) verified your identity before issuing that certificate, the signature also tells the recipient who you are.

How a recipient checks each type

The two types are verified in very different ways. That difference is often what decides which one you need.

• Electronic signature: the recipient relies on the platform’s audit trail, such as email addresses, IP addresses and timestamps, usually in a separate certificate of completion.
• Digital signature: the recipient opens the file in standard software, such as Adobe Acrobat, which checks the certificate chain and the document hash on its own.
• If the platform disappears: an audit trail may be hard to retrieve, while a digital signature stays verifiable inside the file.

Digital signature vs electronic signature in practice

• Typed or drawn signature on a web form: electronic signature.
• “I agree” checkbox with a login record: electronic signature.
• PDF signed with a document signing certificate on a hardware token: digital signature.
• Email signed with an S/MIME certificate: digital signature.

Are digital signatures legally binding in the US?

Yes, in most transactions. Under the federal ESIGN Act and the state Uniform Electronic Transactions Act (UETA), a signature or contract may not be denied legal effect just because it is electronic, and digital signatures count as electronic signatures. This is general information, not legal advice.

The Electronic Signatures in Global and National Commerce Act (ESIGN) became law on June 30, 2000. UETA is a model law that nearly every state has adopted. Neither law requires a particular technology, so a simple electronic signature and a digital signature are both valid in principle.

There are exceptions. ESIGN does not apply to wills, codicils and testamentary trusts, to family law matters such as adoption and divorce, to court orders and filings, or to certain notices, such as utility shutoff and foreclosure notices. Your industry, your state or your counterparty may also set stricter rules. Ask your attorney when a document carries real legal or financial weight.

Note: “Legally valid” and “easy to prove” are not the same. A digital signature makes it much easier to show who signed and that the file is unchanged if a signature is ever disputed.

When do I need certificate-based signing?

You need certificate-based signing when you must prove document integrity, show a verified signer identity or meet rules for regulated documents. For a routine internal approval, a simple electronic signature is often enough.

Use a digital signature if …	A simple e-signature is often enough if …
The file must show it was not altered after signing	The agreement is low-risk and internal
Recipients outside your company must verify the signer	Both sides use the same e-signature platform
A regulator, agency or contract requires certificate-based signatures	No rule asks for a specific signature technology
The document must stay verifiable for years, independent of any platform	The platform’s audit trail is all the evidence you need

Most certificate-based signing happens in PDFs. To see how to digitally sign PDFs that Adobe Acrobat shows as valid, read our step-by-step guide.

Can I combine electronic and digital signatures?

Yes. Many e-signature platforms collect a simple electronic signature from each signer and then apply a certificate-based digital signature to the finished PDF, so the result is tamper-evident.

In that setup the platform’s certificate usually seals the document, not each signer’s own certificate. That protects integrity, but it shows the platform’s identity rather than yours. If you want your own verified name or your company’s name on the signature, you sign with your own document signing certificate. Some platforms let signers use their own certificate; check your platform’s settings.

1. Collect signatures with your e-signature workflow as usual.
2. Have the platform, or your own certificate, apply a digital signature to the final PDF.
3. Store the signed PDF so anyone can verify it later, even without the platform.

The same principle applies to email: S/MIME email certificates add a digital signature to messages, so recipients can confirm the sender and see whether the content changed.