Foiling zero-error attacks against coherent-one-way quantum key distribution
Foiling zero-error attacks against coherent-one-way quantum key distribution
To protect practical quantum key distribution (QKD) against photon-number-splitting attacks, one could measure the coherence of the received signals. One prominent example that follows this approach is coherent-one-way (COW) QKD, which is commercially available. Surprisingly, however, it has been shown very recently that its secret key rate scales quadratically with …