Tallinn (AFP)

Could a QR code open the door to the world?

This is the question posed in Estonia which, together with the World Health Organization (WHO), is leading efforts to develop digital vaccine passports, recognized worldwide.

The problem is whether anyone who verifies such a certificate can "trust the source" of the document, underlines Marten Kaevats, Estonian government adviser on technological issues.

"The solution will have to work in Eritrea as well as in Singapore," he said.

Estonia already has its own electronic health record system containing information on vaccines, but most countries in the world do not have one and there are no methods of mutual recognition of such documents. national.

- "Yellow chip card" -

The project is one of many digital vaccine passport initiatives launched around the world, all of which raise pressing privacy and human rights questions.

WHO is also cautious and does not recommend vaccination passports for travel at this time, not considering them as a sufficient guarantee of protection against transmission.

Nonetheless, digital certificates open up an attractive prospect, especially for industries affected by a pandemic such as airlines.

Emirates and Etihad last month announced tests on an app to check vaccinations before boarding.

An agreement between the WHO and Estonia is to develop a "yellow smart card" - a digital version of an existing paper document system to prove vaccination against yellow fever.

According to Kaevats, who also advises the WHO on digital health issues, it is "impossible" to create a global digital identification system in the coming months, and a mix of paper and electronic certificates seems more likely.

The work is focused on the elaboration of global principles with a view to developing "a single common solution for verifying the existence of the care providers" who issue the certificates in question.

- Private life and human rights?

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Estonia, a country of 1.3 million people, has made a name for itself as a technological pioneer, with Estonians contributing to projects such as Skype, electronic voting or transport robots.

Guardtime, an Estonian company that is working on Covid-19 digital certificates, is also working with Iceland, Hungary and Lithuania, as well as with AstraZeneca, the pharmaceutical group making one of the coronavirus vaccines.

According to Ain Aaviksoo, Guardtime's chief medical officer, the first countries will start using digital passports nationally "in the coming weeks".

Mr Aaviksoo dismisses privacy concerns, pointing out that his group uses blockchain technology to protect data.

Personal and health-related data remains protected in its original location and the system provides only "cryptographic proof of the certificate and the process of its issuance, as well as the authenticity of the vaccine".

In response to similar concerns, the joint WHO-Estonia project is based on the principles that people should be allowed to delete their data, and tech groups should not be allowed to profit from processed data.

However, according to Ana Beduschi, associate professor of law at the University of Exeter in Great Britain, similar initiatives still raise "essential questions of data protection and privacy".

These certificates risk creating "a new distinction between people, depending on their state of health," she told AFP.

According to Ms. Beduschi, before widely deploying the new system, vaccines must first be made available everywhere and alternatives for those who cannot be vaccinated, such as pregnant women, for example.

"It is not enough to develop technical solutions for verifying the state of health of people", insisted the professor, adding that "the risks of deployment of such technologies must be anticipated and reduced as much as possible".

© 2021 AFP