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Thursday, July 14, 2022

European Block Chain Uses, Cases

Six use cases mentions, useful.

Europe's Blockchain: A Solution Struggling to Find a Problem    By Arnout Jaspers

Commissioned by CACM Staff,July 12, 2022

Part of the problem is that participation in EBSI is restricted to companies who obtain accreditation from their national governments. During Demo Day, several panelists urged the European Commission to open up EBSI to independent developers.

The European Commission (EC) has been investing a lot of resources in the European Blockchain Services Infrastructure (EBSI). During an online Demo Day, six 'use cases'  were demonstrated, although they all were still at the pilot level.

Outside experts have mixed feelings about the initiative. 

Early Adopters Demo Day in late May was the provisional culmination of a major technology  project initiated by the EC in 2018. EBSI was to become a European Union (EU)-wide service to verify credentials like driving licenses and diplomas. EU citizens have the right to live, work and study in every EU member state, with hardly any restrictions. A European digital identity and digitally verifiable credentials should make it much easier for citizens to move to another member-state, and to decrease the administrative burden for them and for governments.

The six use-cases presented all had a similar structure: a Trusted Accreditation Organization (TAO) can certify various Issuers (for instance, a university) to issue a verifiable credential (like a diploma) to a Holder (a student). The Holder stores this in his or her digital wallet (on a cellphone, for instance). When asked by a Verifier (another university or an employer) to supply proof of having a diploma, the Holder sends this verifiable credential from her digital wallet to the Verifier.

This chain of trust is protected against fraud by digital signatures. It starts with a TAO–typically a government authority, which issues accreditations secured by a digital signature. Other parties down the chain also sign credentials with digital signatures, all encrypted with the secret key of the issuer. Every receiver down the chain of trust can decrypt this signature with the public key of that issuer. The fact that decryption produces a readable message, not gibberish, proves to the receiver that the signature is authentic. This chain of trust is similar to the system of QR (Quick Response) codes widely adopted in the EU to prove the holder had been vaccinated against Covid-19. ... ' 

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