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A simple electronic signature that says what it is

The HawkOpen signature is a simple electronic signature (SES) as defined in Article 3(10) of the eIDAS Regulation. It is not a qualified signature (QES). The recipient opens the document through a link with a code sent by email, then signs or declines. This creates an evidence report with the document’s SHA-256 hash, the server time and an Ed25519 seal, verifiable on a public page.

Content updated:

SES
simple signature, eIDAS Art. 3(10)
SHA-256
document hash in the report
Ed25519
seal on the evidence report
OTP
access code sent by email

Availability. HawkOpen is in a controlled launch. PDF tracking, proposals and e-signature only work once external file scanning is switched on; without it, the server does not accept files.

SES vs AES vs QES under eIDAS

Simplified. For a specific case, check which form your legal transaction requires.
LevelWhat it isHawkOpen
Simple (SES)Data in electronic form that a person uses to sign. It cannot be denied legal effect solely because it is electronic.Yes
Advanced (AES)Uniquely linked to the signatory and tied to the data in a way that makes any change detectable.No
Qualified (QES)Advanced, with a qualified certificate. Equivalent to a handwritten signature in the EU.No

What’s in the evidence report

  • A SHA-256 hash of the signed document, so any change to the file is detectable.
  • A hash of the signer’s email address and a record that access was through a one-time code.
  • Time from the HawkOpen server. This is not a qualified timestamp.
  • An Ed25519 seal you can check on the verification page or in your browser, without sending any data.

When a simple electronic signature is enough

A simple signature works where the law does not require a specific form: order confirmations, acceptance of terms of cooperation, formal records or internal approvals. Contracts that must be in written form to be valid, or that require a qualified signature, need to be signed another way.

If you are not sure, ask a lawyer which form your transaction needs.

Frequently asked questions

Is a HawkOpen electronic signature legally valid?

It is a simple electronic signature. It cannot be denied legal effect solely because it is electronic, but it is not equivalent to a handwritten or qualified signature. The required form is assessed separately for each transaction.

Can I sign a PDF online?

Yes. The recipient opens the link, confirms access with the code from the email and signs the document in the browser.

Does HawkOpen use a qualified timestamp?

No. The report contains the HawkOpen server time and an Ed25519 seal.

Try HawkOpen on your own emails.

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