Free encrypted electronic signature: what to look for, and what to avoid

Search for a free electronic signature and you will find three different kinds of product wearing the same label, which is why the results are so confusing. Knowing which kind you are looking at takes about thirty seconds once you know what to check, and it decides whether your document stays private. This is a short guide to that, and yes, DocSign is one of the options and it is free with a Cryptool account.

The three kinds of free

Free trial. The large vendors offer a limited number of documents, then ask for a card. Nothing wrong with it, but it is not a free tool, it is a sample. Check the envelope limit before you build a workflow on it.

Free tier of a paid product. Usually capped at a few sends a month with the useful parts held back, templates and multiple signers being the common ones. Fine for signing one thing, frustrating as a habit.

Free because the cost is elsewhere. Some browser tools are free because your document is the product, or because the business is advertising. Read what happens to the file after you close the tab.

What encrypted should mean

Almost every vendor says "encrypted", and almost always it means encrypted in transit and at rest, with the vendor holding the keys. That is normal and it protects you against a stolen disk. It does not stop the vendor, or anyone who compels the vendor, from reading the document.

The stronger version is client-side encryption: the document is encrypted in your browser before it is uploaded, and the key is wrapped so that the server can store the file without being able to read it. If a product means that, it will say so specifically, and it will also be able to tell you what the trade-offs are. Vagueness here is the tell. A product that only says "bank-level encryption" is describing the ordinary kind.

The questions worth asking

Can the vendor read my document, and how do they know? What exactly is stored after signing, and for how long? Can I get a copy that does not depend on keeping an account with them? Is there an audit trail, and can it be altered afterwards without leaving a trace? Who does the signature request appear to come from? Those five answers separate the serious tools from the rest, regardless of price.

Where DocSign lands

Free with a Cryptool account, with no envelope cap and no per-seat charge.

Client-side encryption, in the specific sense above: encrypted in your browser, key wrapped to your account key, server never holds plaintext. The trade-off is that an encrypted document cannot be shared with workspace members, because you alone hold the key.

Sovereign mode, where the PDF never leaves your device, only a fingerprint is stored, and the signed copy is emailed rather than retained.

A hash-chain audit trail, so each event links to the previous one and later tampering breaks verification. Tamper-evident, which is the honest word for it.

Typed, drawn, or uploaded signatures, with the sender deciding which are acceptable, and an uploaded image recorded distinctly from a live drawing.

Requests from your own mailbox, through a connected Gmail or Outlook account, plus optional emailed one-time codes for signer verification.

Common questions

Is an electronic signature legally binding?

In many jurisdictions electronic signatures are recognised, but the details depend on where you are and what kind of document it is, and some documents are excluded. We do not claim conformance with any particular standard for DocSign, and any vendor giving you a confident one line answer to this question is overselling. Ask your counsel about your specific document.

What is the difference between an electronic signature and a digital signature?

An electronic signature is the general idea of signing without paper. A digital signature is the cryptographic technique often used underneath. Most products marketed as e-signature use cryptography of some kind, so the terms get used interchangeably in practice.

Can I sign a PDF without creating an account anywhere?

Some browser tools allow it, but you are then trusting a tool you know nothing about with the document. If it matters enough to sign, it usually matters enough to know where it went.

Does free mean my documents are used for something?

For DocSign, no. It is free because it is included with a Cryptool account, and in the encrypted and sovereign modes the platform cannot read the documents even in principle.

How do I try it?

Open DocSign with your Cryptool account, upload a document, place the fields, and send it.