Biometric Signature

Security and simplicity united for signing on a tablet

What is a biometric signature?

A biometric signature is a handwritten electronic signature that is created on a tablet and is capable of capturing biometric information during the signing process. The captured evidence is encrypted, stored securely and embedded in the document that has been signed.

How does the biometric signature work?

An example of the biometric signature process in the insurance sector:

STEP 1 – Explaining the content of the electronic document

An insurance agent visits a client at home. After choosing an insurance plan that fits the client’s needs, the agent explains the terms and conditions using an electronic document, which is being fully displayed on a tablet.

STEP 2 – Completing the data

The agent completes the electronic form with the client’s personal information.

STEP 3 – Confirming that everything is understood

The customer reads the contract on the tablet, confirms that he has understood everything and that he agrees.

STEP 4 – Client signs on the tablet

The client signs on a tablet and his signature along with the biometric information (speed, inclination, applied pressure, etc.) is captured and encrypted in the electronic document. In addition, other evidence, such as the exact time of signing and data of the tablet is saved.

STEP 5 – Agent signs on the same tablet

The agent can also sign the document if necessary (either with the biometric signature or through any other VIDsigner signature service). He then sends it for preservation.

STEP 6 – Archiving the document

The document will be sent to the client by email and is filed electronically by the company.


A document in PDF format that contains the embedded signatures as well as the captured and encrypted evidence. Furthermore, it is signed in accordance with the ETSI long-term signature validation standard (PAdES-B-LT), which guarantees its integrity and validation over time.


What are the benefits of the biometric signature?

Faster and more secure

Reduces paper, ink and shipping costs

Allows direct access to documents

Easily integrates with any management system via Rest API

Ensures notarial involvement in the storage of encryption keys

Ensures file integrity

Saves archive space thanks to digital storage

WYSIWYS guarantee (What You See Is What You Sign)

Guarantees an SLA that ensures the highest levels of service availability

Uses ISO standards

Full legal validity

Uses timestamps for each signature

Certificates issued by a qualified provider

Examples of use of electronic signatures

Human Resources

Employment contracts, work instructions, training, among others.

Health Sector

Informed consent, anamnesis, treatment plans and GDPR consent, among others.

Public administration

Self assessment tax returns, legal procedures, registration processes, among others.


Contracts at a POS (bank, car rental etc.), insurance contracts in the client’s home, among others.

The use of the biometric signature in the Public Administration of Parets

In recent years the Public Administrations have had to adapt to the new regulations in electronic administration. We had an issue with the amount of papers: Some of our social workers had to do administrative work. And we also faced a problem with archiving all the documentation. The main reason why we deployed VIDsigner’s service was to comply with Law 39/2015 which requires a paperless administration but also for legal security. The use of tablets and biometric signatures is the way to efficiency and immediacy in administrative actions. For citizens, signing with VIDsigner is a very natural and simple process as they do not need to own any device or have any technological knowledge.”

Assumpta Torres Julià, head of the Office of Citizen Attention and Electronic Administration – Town Council of Parets

What is the biometric security of the electronic signature?

The strength of a biometric signature as evidence in a lawsuit depends on several factors. Below we explain the biometric elements that guarantee the robustness of a digital signature created with VIDsigner:


"Not all devices offer the same guarantees."

The devices used must comply with the mandatory requirements of capturing the necessary biometric elements, but not all devices are able to provide information about the applied pressure during signing, which is essential for a reliable calligraphic evaluation.

For VIDsigner we have made a strong commitment to using only tablets with stylus with the ability to capture pressure and fully display the document, something a simple signature pad is not able to do. This compromises the electronic evidence since it cannot be clearly demonstrated that the signer knew exactly what he was signing.

To guarantee a maximum of quality and legal certainty, VIDsigner only allows the signature on this type of tablets. It is not possible to sign with a finger. 

See list of supported devices


"The use of standards and the security of biometric data are essential elements."

VIDsigner collects biometric information from the device (speed, inclination, applied pressure, …) and encodes it according to the ISO/IEC 19794-7 standard. This guarantees its future expert assessment, regardless of technological evolution.

It also has a tool for forensic analysis and comparison of biometric signatures to facilitate the evaluation through a calligrapher. The better the quality of the evidence and the more evidence that the chain of custody could not be broken, the more legal guarantees we obtain.

VIDsigner is not a simple biometric signature software for signature tablets, but a complete and centralized solution, which acts as a guarantor for the correct signature collection process.


"Technology by itself and in isolation does not guarantee the integrity and authenticity of the signed document. It is necessary to process and secure the captured evidence.”

VIDsigner is a service, which, in addition to simplifying the integration process and allowing for absolute scalability, enables us as a trusted service provider to guarantee that the process has been executed correctly and that the signed document is indeed the one that the signer has seen (WYSIWYS – What You See Is What You Sign).

The use of a signature service provider also guarantees independence in the process as it is managed by a non-interested party.

In addition, VIDsigner uses notarially generated and guarded keys to encrypt the information. The notary possesses all the necessary elements to decrypt the evidence associated with the document in the event of an injunction in the context of a dispute.