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Digital Green Certificate (DGC) — A Great Step Forward To Address A Problem, But A Technical Opportunity Missed?

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And so the good news is that we are moving to open up our borders safely with the usage of vaccination passports. In the EU, we see the Digital Green Certificate (DGC) and it’s a great step forward. But, for a way forward, have we missed a great opportunity to do things properly, and create a scalable system for the future?

Certainly, the collaboration of health care authorities across the EU is an excellent approach, but technically the devil will be in the detail, and the current solution is just a plain old PKI solution with a centralised infrastructure. The tools are now here for much better solutions, so I suppose it’s just go for a quick-and-dirty solution, or just push forward new innovation that could be scaled into the future.

Overall there will be three certificates: vaccination certificates, test certificates (NAAT/RT-PCR test or a rapid antigen test), and certificates for persons for those who have recovered from COVID-19. An example certificate is:

In operation, basically, there will be a centralised system that will receive…

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Prof Bill Buchanan OBE FRSE
ASecuritySite: When Bob Met Alice

Professor of Cryptography. Serial innovator. Believer in fairness, justice & freedom. Based in Edinburgh. Old World Breaker. New World Creator. Building trust.