Quantum Key Distribution (QKD) requires special (expensive) hardware, so it really doesn’t solve the problem of key size. Moreover, QKD still requires an authen

Quantum Key Distribution (QKD) requires special (expensive) hardware, so it really doesn’t solve the problem of key size. Moreover, QKD still requires an authenticated channel, so we’ll still need a quantum-resistant authentication scheme. (All in all, QKD does not have a singular use case) See https://cyber.gouv.fr/en/publications/should-quantum-key-distribution-be-used-secure-communications https://cyber.gouv.fr/en/publications/should-quantum-key-dis...