Electronic signature vs digital signature
The terms are often used interchangeably, but they mean different things. Here's the distinction — and why it matters for the legality of what you sign.
Two terms, two meanings
An electronic signature is a broad legal concept: any electronic mark, sound, or process a person adopts with intent to sign. A digital signature is a specific technical method — a cryptographic mechanism using public-key infrastructure (PKI) — that can underpin an electronic signature. Every digital signature is an electronic signature, but not every electronic signature uses digital-signature technology.
What an electronic signature is
Under the US ESIGN Act and UETA, an electronic signature is legally defined by intent, not technology. Typing your name, clicking “I agree,” or drawing a signature with a mouse can all qualify. What makes it enforceable is intent to sign, consent to transact electronically, and a record tying the signature to the document.
What a digital signature adds
A digital signature uses cryptography to bind the signer's identity to the document and to detect any later tampering. It relies on a certificate and a key pair, producing a mathematically verifiable seal. This is what powers tamper-evidence and long-term validity in standards like PAdES — the technical backbone behind a trustworthy electronic signature.
Which one do you need?
For most US business contracts, a well-implemented electronic signature with a solid audit trail is all you need to be legally binding. Higher-stakes or regulated documents benefit from the cryptographic assurance of a digital signature underneath. Certyneo combines both: an easy electronic signing experience backed by cryptographic sealing and a court-admissible audit trail.
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Frequently asked questions
Is a digital signature more legal than an electronic signature?
Not “more legal” — both are legally binding under ESIGN/UETA. A digital signature adds cryptographic proof of integrity and identity, which strengthens the evidence if a signature is ever challenged.
Do I need a certificate to sign electronically?
Not for a basic electronic signature. Certificates are part of digital-signature technology, which platforms like Certyneo apply behind the scenes to seal your document.
Which is used for e-signing contracts online?
Reputable platforms give you an easy electronic-signature experience while applying digital-signature cryptography underneath to seal and protect the document.