Financial institutions are initiating pilot deployments of Quantum Key Distribution to safeguard core clearing networks. With post-quantum cryptography standards nearing finalization, defense-in-depth strategies are moving to physical layer security.
Infrastructure Deployment
Telecom operators in Europe and Asia are deploying dedicated dark fiber pairs optimized for single-photon transmission. These networks generate unhackable encryption keys using fundamental quantum physics principles rather than mathematical complexity.
Commercial Viability Bottlenecks
High capital costs for specialized optical detectors and limitations on transmission distance remain the primary constraints to global scale, currently capping unboosted fiber runs at roughly 100 kilometers without trusted nodes.