Digital Signature vs Electronic Signature: What's the Difference?
The terms “digital signature” and “electronic signature” are often used interchangeably, but they refer to two different things with distinct technical and legal meanings.
Understanding the difference is important — especially if you're handling legal documents, contracts, or compliance-sensitive paperwork. In this guide, we'll break down what each term means, how they work, and when to use each one.
Key Differences at a Glance
| Feature | Electronic Signature | Digital Signature |
|---|---|---|
| Definition | Any electronic mark indicating intent to sign | Cryptographically secured signature with identity verification |
| Technology | Simple (drawn, typed, or scanned image) | Public Key Infrastructure (PKI) |
| Identity Verification | No inherent identity verification | Verified through digital certificates |
| Security Level | Standard | High (tamper-evident) |
| Legal Framework | ESIGN Act, eIDAS, UETA | ESIGN Act, eIDAS (Advanced/QES) |
| Cost | Free | Paid (certificate costs) |
| Best For | Everyday documents, contracts, agreements | High-security documents, regulated industries |
| Implementation | Online tools like LazySign | Specialized software with certificates |
What Is an Electronic Signature?
An electronic signature(e-signature) is the broad term for any electronic mark, sound, symbol, or process that shows a person's intent to sign a document. This includes:
- Signatures drawn with a mouse, trackpad, or touchscreen
- Typed names at the bottom of an email or document
- Scanned images of handwritten signatures
- Clicking an “I Accept” button on a website
Electronic signatures are legally binding in most countries under laws like the US ESIGN Actand the EU eIDAS regulation. They are suitable for the vast majority of everyday documents.
What Is a Digital Signature?
A digital signature is a specific type of electronic signature that uses cryptographic technology to verify the identity of the signer and ensure the document has not been tampered with after signing.
Digital signatures rely on Public Key Infrastructure (PKI) and involve:
- A digital certificate issued by a trusted Certificate Authority (CA)
- Encryption that links the signature to the signer's identity
- Tamper detection — any change to the document invalidates the signature
Digital signatures are a subset of electronic signatures. All digital signatures are electronic signatures, but not all electronic signatures are digital signatures.
When to Use Each Type
Use an Electronic Signature When:
- Signing everyday contracts and agreements
- Approving internal documents
- Signing consent forms and permission slips
- Adding signatures to invoices or proposals
- Quick document turnaround is needed
Use a Digital Signature When:
- High-security documents require identity verification
- Regulated industries (finance, healthcare, legal) require it
- Tamper-proof audit trails are mandatory
- Documents will be filed with government agencies
- Compliance with specific regulations (e.g., FDA 21 CFR Part 11)
Legal Recognition
Under the EU's eIDAS regulation, digital signatures correspond to Advanced Electronic Signatures (AES) and Qualified Electronic Signatures (QES). These provide higher levels of assurance than simple electronic signatures (SES).
In the United States, the ESIGN Act and UETA do not distinguish between different technical types of electronic signatures — all are treated equally as long as they demonstrate intent to sign.
For most everyday use cases, a simple electronic signature created with a tool like LazySign is perfectly sufficient and legally binding.
The Bottom Line
While the terms are often used interchangeably, electronic signatures and digital signatures serve different purposes. Electronic signatures are about demonstrating intent to sign and are suitable for most everyday documents. Digital signatures add cryptographic identity verification for higher-security use cases.
For the vast majority of document signing needs — contracts, agreements, consent forms, and approvals — a simple electronic signature created with a free online tool is perfectly adequate and legally binding.