Quantum Key Distribution with Entanglement-Swapped Photons from a Quantum Emitter

Quantum key distribution QKD is a fundamental functionality of quantum networks. Extending its range requires quantum repeaters, a technology still under development and not yet demonstrated in combination with quantum cryptographic protocols. Here, we address the elementary operation of a viable...

Cryptographic Fragility of Standard Quantum Repeater Protocols

The security of the proposed quantum Internet relies on repeater protocols designed under the assumption of stochastic, characterizable noise. We demonstrate that in adversarial environments this assumption induces performance vulnerabilities for computationally bounded repeater nodes. We show th...