Electronic signature: the broad category
An electronic signature, or e-signature, is an electronic action or mark adopted to sign a record. A typed name, handwriting drawn on a screen, an uploaded signature image or an acceptance action can be part of such a process. Whether it meets a particular legal requirement depends on the context, not just how the mark looks.
When someone casually asks for a “digital signature on this PDF,” they may simply mean a visible signature. Ask whether they need a signed-looking document or a certificate-based signature that a PDF reader can validate. That single question prevents choosing the wrong workflow.
Digital signature: a cryptographic mechanism
A cryptographic digital signature is calculated from signed data using a private key. Verification uses the corresponding public key. If covered data changes, verification can reveal a problem. A certificate can bind a public key to an identity, but the confidence you can place in it depends on who issued it and how identity was checked.
The US National Institute of Standards and Technology's Digital Signature Standard describes algorithms for generating and verifying digital signatures. A scanned handwriting image is not one of those cryptographic mechanisms.
Digital signatures need not have a visible handwritten appearance. Conversely, a graphic that says “digitally signed” does not establish that cryptographic signing occurred. Inspect validation information in a compatible reader when a certificate signature is required.
Electronic signature vs digital signature at a glance
| Question | Electronic signature | Cryptographic digital signature |
|---|---|---|
| What does it represent? | An electronic expression of signing intent | A signature value calculated from data using a key |
| Must handwriting be visible? | No; appearance depends on the method | No; a visible stamp is optional |
| Does a pasted image detect edits? | No | Verification checks the covered signed data |
| Is identity automatically proven? | No; look at the surrounding process | Not automatically; certificate trust and identity checks matter |
| Are the terms legally interchangeable? | No | Legal recognition and required signature levels vary |
| Does Way2Sign provide it? | Visual drawn, typed and uploaded signatures | No certificate-based PDF signing or qualified signatures |
What happens if a PDF changes after signing?
With a visual signature, changing the document may leave the signature image in place. That image is not a tamper-detection system. Preserve the agreed final version and keep evidence of the exchange.
With cryptographic PDF signing, the reader evaluates the signed revision and subsequent changes. Some workflows permit specific later actions, such as another signature or authorized form filling. It is inaccurate to say that every change always invalidates every signature in the same way. The reader's validation details and permitted-change rules matter.
Avoid converting, flattening, merging or compressing a certificate-signed PDF unless the recipient confirms the workflow. A readable new PDF is not necessarily a PDF that preserves the original digital signature.
Which method should you choose?
Start with the recipient's requirements. For a simple visual approval that the recipient accepts, a browser-based e-signature may be enough for the workflow. For identity checks, multiple signers, audit records, trusted timestamps or regulated submissions, choose a service providing those specific capabilities.
The EU's eIDAS framework distinguishes ordinary, advanced and qualified electronic signatures. “Digital” does not automatically mean “qualified.” A cryptographic signature may be self-signed or issued under a different trust model.
Where Way2Sign fits
Way2Sign creates visual signatures and text overlays, with standard document processing in the browser. It does not issue signing certificates or verify a signer's legal identity. Optional account features are separate from the local signing flow. See Security before choosing it for sensitive paperwork.
To use it, open the document, choose Draw, Type or Upload, place your signature, then download and inspect the result. If the sender specifically requested an Adobe certificate signature, a qualified signature or their own signing invitation, do not substitute this visual-signature workflow.
For the legal question behind these terms, read Are electronic signatures legally binding?. For appearance and mobile usability, compare typed, drawn and uploaded signatures.
Common questions
Is an e-signature the same as a digital signature?
Not precisely. E-signature is a broad signing concept; digital signature usually refers to a cryptographic mechanism. Everyday language often blurs the terms.
Is a scanned signature a digital signature?
It is a signature image that can be used in an electronic-signing process. It is not a cryptographic digital signature merely because it is stored digitally.
Is a digital signature always legally stronger?
No blanket rule applies. Applicable law, certificate trust, the signing process and the document requirements determine the relevant effect and evidence.
Can Way2Sign create a certificate-based digital signature?
No. Way2Sign adds visual signatures to documents; it does not provide certificate-based PDF signing, qualified signatures or certified identity verification.