Self-sovereign identity on blockchain

Decentralized digital identity  and authentication on Blockchain.

Self-sovereign identity system, based on the AlastriaID model, based on Blockchain technology.

Different technologies are used to shape the service, using as a basis the decentralization of the user identifier in a Blockchain network.


Gartner Hype Cycle for Blockchain and Web3,2022 by Avivah Litan

Decentralized Digital Identity on Blockchain

Blockchain and Alastria

With the Alastria Network, the main network in Spain, a public network, the existence of Smart Contracts allows certain business processes to be carried out in it.

World Wide Web Consortium

Definitive ID® is based on the international DID (decentralised indicators) standard established by W3C.

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Objectives of Definitive ID®

Create the user’s prymary data in the form of decentralized credentials

Ensure compliance with laws on GDPR and eIDAS2

Mitigate economic and reputational risk due to lack of traceability

Generate a simple, clear, safe and self-sovereign digital environment

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Definitive ID® Technology

Definitive ID®

The user logins or signs up on your app organization.

The user starts credential generation process with Definitive ID ® software. The user accepts first credential request from the company. It doesn’t reflect anything about user data on blockchain record, only about credential status. It means, the data privacy is guaranteed.

Now the user has a list with validated credentials and all caracteristics.

Your company and third parties could request credentials from the user. The user has self-sovereingty about data and could accept, deny and revoke credentials anytime.


Education credentials

Finance, banking and financial technology

Employee Onboarding and Gig Workers



Loyalty Programs

Medical Privacy

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Creation of decentralized identities

No user’s personal data can be stored in the public Blockchain, none, not even encrypted.

The Enrollment process in Blockchain must generate a universal identifier for the user (DID), this identifier must be recorded in the blockchain, so that it is invariable over time and no one can manipulate it.

From the user identifier there can be no inference of user data.

The user password matching process must be performed from a network node, but the password cannot be stored in the network, not even its hash.

Digital Identity

Project: Definitive ID®

Members and users of Cádiz CF, with digital identity in Blockchain for all the club’s services

Digital Identity

Project: Definitive ID®

The RFEF launches its Fan Club of the Spanish National Team through an APP with blockchain.










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