Electronic vs. digital signature
People use these terms interchangeably, but they mean different things. One is a legal concept; the other is a technology. Here's the difference — without the jargon.
An electronic signature is the broad legal concept: any electronic indication that a person intends to sign — a typed name, a drawn signature, or a click. A digital signature is a specific cryptographic technology, based on public-key infrastructure (PKI), often used to secure and verify electronic signatures. Every digital signature is one way to implement an electronic signature — but not every electronic signature relies on digital-signature cryptography.
This is general information, not legal advice.
Electronic signature: the legal idea
“Electronic signature” is a legal term. It describes the act of signing, captured electronically, with the intent to be bound. The law — the U.S. ESIGN Act, UETA, and the EU's eIDAS — defines it deliberately broadly and technology-neutral. What matters is intent, consent to do business electronically, attribution to a real person, and a record that can be retained. The method is up to you.
Digital signature: the technology
“Digital signature” is a technical term. It refers to a cryptographic technique that uses a pair of keys: a private key that creates a unique mathematical fingerprint of the document, and a public key (vouched for by a digital certificate) that lets anyone verify the signature and confirm the document hasn't changed. It's a powerful way to prove integrity and identity— and it's the engine behind the tamper-evident seals modern e-signing tools apply.
How they fit together
Think of it this way: the electronic signature is what you do (you intend to sign), and the digital signature is one of the cryptographic tools that can protect what you did. A good e-signature platform combines them — the easy human act of clicking to sign, backed by cryptographic sealing and an audit trail that makes the result trustworthy and enforceable.
Side by side
| sign.pink | Digital signature | |
|---|---|---|
| What it is | A legal concept — intent to sign | A cryptographic technology (PKI) |
| Defined by | Law (ESIGN, UETA, eIDAS) | Math and standards (public-key cryptography) |
| Example | Typed name, drawn mark, or a click | A PKI key pair and digital certificate |
| Main purpose | Capture agreement and intent | Prove integrity and verify identity |
| Required for validity? | This is what the law requires | Not required, but strengthens the evidence |
| Used at sign.pink | Yes — for tamper-evident sealing |
They're not rivals — sign.pink uses both: you apply an electronic signature, we secure it with cryptographic sealing.
Which term should you use?
For everyday purposes, “electronic signature”(or just “e-signature”) is the right phrase — it's what contracts, vendors, and the law actually mean when they talk about signing online. Reach for “digital signature”only when you specifically mean the PKI cryptography under the hood. Mixing them up won't void your contract, but knowing the difference helps you ask the right questions — and spot when a vendor is charging premium prices for a level of cryptography you may not need.
Electronic vs. digital signature FAQ
An electronic signature is the broad legal concept: any electronic indication that a person intends to sign — a typed name, a drawn signature, or a click. A digital signature is a specific cryptographic technology (using public-key infrastructure, or PKI) that's often used to secure and verify electronic signatures. Put simply: every digital signature is one way to implement an electronic signature, but not every electronic signature uses digital-signature cryptography.
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