Quantum cryptography demo shows no need for ritzy new infrastructure

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Telefónica and Huawei shoot freakin’ lasers down existing optical networks for QKD

Telefónica and Huawei have carried out a successful field trial of quantum cryptography on commercial optical networks.

Other teams, notably a Toshiba Research and Cambridge University Engineering Department, have made great strides in Quantum Key Distribution (QKD), a technology that promises unprecedented secrecy.

While previous efforts have concentrated on dummy networks and the lab, Telefónica and Huawei’s tests were carried out over existing optical networks. Others have focused


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