Quantum communication protocol enables three users to establish a shared secure key
Quantum key distribution allows two users to establish secret keys whose security is grounded in the laws of quantum mechanics. Extending this capability to multiple users is an essential step toward quantum networks that support secure communication among many participants. Quantum cryptographic conferencing addresses this need by enabling multiple users to share the same secure key, which they…
We haven't written up this one. Phys.org has the full story — the link below goes straight to it.