Technology

Legal technologydesigned to resist digital fraud

At TsubaSign, every signature is protected by a technical architecture that legally proves each step of the process: who signed, when, how and from where. It is not just security. It is demonstrable legal validity.

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TsubaSign technical architecture with blockchain, biometrics and encryption

Evidence infrastructure

Signing no longer protects you. You need to prove everything.

In audited or legally exposed sectors, a digital signature without evidence is worthless. TsubaSign combines blockchain, biometrics, advanced encryption and document verification into an evidence infrastructure, ready for inspections, litigation and compliance.

Blockchain

Immutable evidence

Every signature is recorded as a unique hash on a public or private blockchain. Impossible to alter without leaving a trace.

Serves as immutable legal evidence before judges or auditors.
Generates a certified timestamp (exact date and time).

Security and encryption

End-to-end protection

All actions are encrypted with legal standards. Every event (signature, rejection, modification) is sealed.

Legally auditable encryption.
Granular management of permissions and roles.

Biometrics + Liveness proof

Prevents impersonation

Real-time facial or document validation: prevents signatures by unauthorised people.

Automated biometric comparison.
Compatible with apps, SMS and secure links.

eIDAS certified documents

Legality assured across Europe

Every signed document complies with European regulation (eIDAS Regulation).

Certification with qualified providers (QTSPs).
Evidence valid before notaries, public bodies and auditors.

Technology compliant with eIDAS Regulation, GDPR and ISO standards.

TsubaSign meets the most demanding regulations so that your digital signature is not only secure, but legally recognised across the EU.