Tsubacheck uses a biometric authentication layer, which makes it possible to identify the signer and guarantee the legal validity of the signed document.

Innovation and Security in Document Authentication

What is an advanced electronic signature?

Tsbacheck‘s advanced electronic signature is distinguished by complying with the technical and legal standards established by the eIDAS regulations (EU Regulation 910/2014) on electronic signatures.

The advanced electronic signature must satisfy the following essential criteria:


It must be uniquely associated and non-transferable to the individual signing.


It must facilitate clear identification of the signatory.


It must be generated from data that the signatory handles securely and is under his exclusive control.


It must be securely connected to the signed information, preventing subsequent alterations to the content.

Firma electronica

Legal Validity Tsubacheck

The implementation of these requirements in the advanced electronic signature provides a higher level of security in the signing and formalization of contracts procedures.

A crucial aspect is the guarantee of the integrity of the signed content, ensuring that neither the document nor the identity of the signatory has been altered post-signature.

Keys to Understanding Their Distinctions and Advantages

What is the difference between an electronic signature and an advanced electronic signature

Electronic signature and advanced electronic signature are two concepts which, although related, have significant differences in terms of security, legality and use cases.




An electronic signature is any data in electronic format used as a method of signature. This can include anything from a scanned image to a handwritten signature;


An advanced electronic signature is a form of electronic signature that meets specific requirements that provide greater assurance as to the identity of the signatory and the integrity of the document. These signatures are usually uniquely linked to the signatory;


The security of a basic electronic signature can vary, but it generally offers a lower level of security compared to an advanced electronic signature. Even some advanced signatures with simple OTPs such as SMS can be repudiated in court;


It offers a very high level of security. It uses strong identity verification methods, such as biometric authentication or the use of certified devices, and ensures that the signature is uniquely linked to the document and the signatory, preventing any subsequent alteration of the signed document;


Although legally valid in many contexts, the basic electronic signature may not be sufficient for certain legal procedures or judicial processes that require more rigorous authentication of identity;


Advanced electronic signatures have wider legal acceptance for a wider range of transactions, including those requiring high levels of security and authenticity. In many countries, it has the same legal validity as a handwritten signature;


Ideal for internal business processes, confirmations of receipt, and less critical documents where the signatory's identity does not need to be verified with the highest level of security;


It is used in contexts that require high security and where it is important to unambiguously verify the identity of the signatory, such as in legal contracts, government documents, financial transactions and other critical documents;

In short, the main difference between simple electronic signatures and advanced electronic signatures lies in the level of security and guarantees they offer;

The implementation of the Tsubacheck advanced electronic signature, with biometric authentication layer, provides a higher level of security in signing and contract formalisation procedures. A crucial aspect is the guarantee of the integrity of the signed content, ensuring that neither the document nor the identity of the signatory has been altered post-signature;

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