5. Conclusion: towards a chain of active citizens

This solution makes the patient the principal agent in the management of his or her health, which today largely involves controlling the data we generate. Medical data is an important category of data to protect. Other data related to finance, social media, real estate, etc. can become the property of the citizen. Everyone has a role to play in the development of today's technologies. It's important to make individuals aware of what's at stake in the data market, and to provide them with a tool that gives them power over what they generate most in the world - data.

While blockchain provides adequate answers to the challenges of data auditability, authenticity and reliability, several problems remain. Firstly, there is the risk of vulnerabilities that public blockchains face. The recent attack