Electronic vs digital signature
"Electronic signature" and "digital signature" are often used interchangeably, but they describe two different things: an electronic signature is a broad legal concept covering any digital data used to show agreement with intent to sign, while a digital signature is a specific cryptographic technology — one possible way of implementing an electronic signature with a higher degree of technical assurance.
Electronic signature: a legal and procedural concept
An electronic signature is defined by what it accomplishes, not by the technology behind it. Under the ESIGN Act of 2000 and the eIDAS Regulation (EU) No 910/2014, an electronic signature is any data in electronic form that a person uses, with intent, to signal agreement with a document. That could be a finger-drawn signature, a typed name with a click-to-accept, or a certificate-based signature — the legal definition doesn't care how it was produced, only that signer identification, intent, and record integrity are present. See What is an electronic signature? for the full breakdown of those requirements.
Digital signature: a specific cryptographic technique
A digital signature, in the strict technical sense, refers to public-key cryptography applied to a document: the signer (or the system acting for them) generates a cryptographic hash of the document and encrypts it with a private key, producing a signature that anyone can verify using the corresponding public key. This technique proves two things mathematically: that the signature came from the holder of that specific private key, and that the document hasn't changed since it was signed, since any alteration would invalidate the hash. A digital signature is a technology — it doesn't, by itself, say anything about a legal framework or jurisdiction.
The relationship between the two
A digital signature is one way — generally considered a strong one — to implement an electronic signature. Under eIDAS specifically, the technical properties of a digital signature (unique link to the signer, sole control over the signing data, tamper-evidence) closely map to the requirements of an advanced electronic signature tier, and a qualified certificate layered on top of that technology can reach the qualified tier. See eIDAS: simple, advanced and qualified signatures for what each tier technically requires. Not every electronic signature uses digital-signature cryptography, though — a simple click-to-accept or a drawn signature tied to a secure, identified link is still a valid electronic signature without using public-key cryptography directly on the document in that specific way.
A side-by-side comparison
|
Electronic signature |
Digital signature |
| What it is |
A legal/procedural concept |
A cryptographic technology |
| Defined by |
Laws (ESIGN Act, UETA, eIDAS) |
Mathematics (public-key cryptography) |
| Requires a certificate |
Not necessarily |
Often, for the strongest implementations |
| Visual appearance |
Can look like a drawn signature, typed name, or click |
Not inherently visual — it's a cryptographic artifact, sometimes paired with a visible representation |
| Tied to a specific tool |
No — the concept applies across tools |
No — the technique can be implemented in many tools |
Why the confusion persists
Part of the confusion comes from software that labels a feature "digital signature" when it's really describing an electronic signature product in a general sense, and part comes from the fact that many modern e-signature platforms do use digital-signature cryptography under the hood — hashing the document and chaining audit events — even for a "simple" signature that doesn't require a formal certificate. The technology (hashing, cryptographic verification) and the legal category (electronic signature) can overlap heavily in practice, which blurs the line between the two terms in everyday conversation.
Does it matter which term you use?
For most business purposes, no — what actually matters is whether the signing process meets the legal requirements for validity (identification, intent, integrity) and whether it gives you a reliable record if the signature is ever questioned. The distinction matters more in specific contexts: if a regulation or counterparty explicitly requires a "digital signature" in the strict cryptographic sense, a simple click-to-accept electronic signature might not satisfy that specific requirement, even though it would be perfectly valid as a general electronic signature elsewhere.
What this looks like in a real signing flow
Document hashing is the part of this picture that most directly touches the "digital signature" side of things: computing a cryptographic hash of the signed document so any later tampering is detectable, chaining each audit event together with hashes, and adding a timestamp conforming to RFC 3161 to independently certify when signing happened. These mechanisms give an otherwise simple electronic signature much of the tamper-evidence that the term "digital signature" implies, without necessarily requiring a formal certificate from the signer.
A common misreading: assuming "digital" always means "more legally valid"
A frequent mistake is assuming that because "digital signature" sounds more technical, a document signed with one is automatically more legally binding than one signed with a simple electronic signature. That's not how either the ESIGN Act or UETA work: both treat a broad range of electronic signature methods as equally valid, as long as the underlying requirements (identification, intent, record integrity) are met. A cryptographically strong digital signature can make a stronger evidentiary case if a signature is ever disputed, but it isn't a prerequisite for basic legal validity on a standard commercial contract.
Where the terminology question actually comes up in practice
In day-to-day business, the electronic-vs-digital distinction rarely surfaces unless you're dealing with a specific regulatory filing, a government agency, or a counterparty's internal compliance policy that explicitly names "digital signature" as a requirement. In those specific cases, it's worth asking exactly what the requirement means in context — some organizations use "digital signature" loosely to mean any electronic signature, while others mean it strictly, referring to certificate-based cryptographic signing. Confirming which one a specific form or policy means before assuming a standard electronic signature will satisfy it can save a rejected filing later.
How to describe your signing process accurately to others
If you need to explain your own signing process to a client, auditor, or counterparty, it's usually clearer to describe the actual mechanics — a secure, individually addressed signing link, a recorded audit trail, document hashing, and an independent timestamp — rather than leaning on either term by itself. Both "electronic signature" and "digital signature" get used loosely enough across the industry that naming the specific safeguards in place communicates more than either label does on its own.
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Frequently asked questions
Is a digital signature more secure than an electronic signature?
They're not directly comparable, since one is a technology and the other is a legal category. A digital signature (the cryptographic technique) can be used to build a more technically robust electronic signature, but a well-implemented simple electronic signature with proper hashing and an audit trail can still be highly secure and legally valid.
Do I need a digital certificate to have a valid electronic signature?
Not for most documents. A digital certificate is typically required for the strongest tiers of signature (such as a qualified signature under eIDAS), but a simple electronic signature — a typed name or drawn signature tied to a secure, identified link — is valid for most commercial documents without one.
Can a document have both an electronic signature and a digital signature?
Yes — many modern platforms apply digital-signature-style cryptography (document hashing, chained audit events) underneath what is, from a legal standpoint, a simple or advanced electronic signature. The two aren't mutually exclusive.
That badge usually refers to the cryptographic signing of the PDF file itself (often using a certificate embedded by the software), which is one specific technical implementation detail layered on top of the broader concept of an electronic signature.
Which term should I use when asking a vendor about their signing process?
It's more useful to ask about the specific requirements you care about — identity verification method, document hashing, audit trail, and whether a certificate is involved — rather than relying on either term alone, since both are used loosely across the industry.