Hi Dominique, you are probably referring to the following news item:

https://www.easa.europa.eu/en/newsroom-and-events/press-releases/easa-e…

Quoting: "Cybersecurity: Information will be exchanged regarding cyber-events and incidents that have an impact on aviation safety, and new technologies and their influence on cybersecurity will be explored. Additionally, “tabletop” cybersecurity exercises will be created and deployed. This new area of cooperation is essential as the two organisations aim for the highest level of safety and resilience of European aviation."

Hello Davide and thank you for your quick answer. My question was more technical, for example: knowing that of the 41 members of Eurocontrol, 14 are not members of the EU, and some are currently in open conflicts, including cyber, with other countries. Who will ensure the security of these exchanges ? Who will decide that the datas exchanged/Showed are not sensitive ?

My reply can be generalised as it is valid, but not specific to this MoC alone. The owner of the information is the organisation (e.g. in the constituency of EUROCONTROL or membership of EASA) that decides to share it and sets the rules for further sharing, if any.
Typically, the rules set out in the Traffic Light Protocol (TLP) are followed, see also:https://www.first.org/tlp/

Thank you for your response, I would then like to draw your attention to the fact that this, generalized as you specify, seems very far from the basic standards of real cybersecurity, it is rather frightening in fact.

Dear Dominique, if you have other proposals or suggestions please share with the community.

... postpone the subject to a later date? Take the time to define what sensitive data is?don't get me wrong, it's just that the world is changing and there remains an impression that we treat things as if the dangers and threats had not multiplied