Conclusion
Quantum Key Distribution QKD (DQC)

QKD and QSC are the answers to the threat of quantum computers. We know that we need to start migrating towards QSC and QKD and follow standardization, research and innovation. The QKD certification initiated by the ETSI ISG QKD standardization group strengthens the link between theoretical proofs (ITS) of QKD robustness and practical realizations of QKD networks containing construction limits. But, whatever the technology employed, side-channels (human flaws, practical implementation procedures) will remain the weak points of information systems security. All the more reason to use quantum physics-based means (QKD) to exchange ephemeral symmetrical keys (with a high level of random entropy) to minimize the risk of espionage.

We need to prepare for migration to quantum key distribution (with ETSI QKD standards) and to post-quantum cryptography as standardized by...