qyron

I did and nowhere is Signal mentioned in the article.

You state Whatsapp uses Signal. So, again: how?

To my knowledge, under Signal, the encription keys are locally generated and stored, and the traffic flows between end points as a closed packet.

This does not seem to be the case here, as the keys are generated and stored outside your equipment and, thus, are viable to be used by a third party to access packets.

But I admit I speak heavily burdened by technical ignorance.

How?

If it is to be implemented in the french public system, it will be enforced by strict orders. IT disliking it will be of no concern.