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Conference key agreement (CKA) is an information processing task where morethan two parties want to share a common secret key. Here, we present aloss-resilient protocol for CKA, based on redundant encoding and errorcorrection. Our protocol provides a speed-up in transmission rate over theexisting lossy CKA protocol. However, encoding and error correction come withextra cost. We show that, using photon sources with creation probability p >0.3, our protocol's secret key rate can overcome the existing protocol's.Hence, high probability entangled photon sources are required for realisticimplementation of our loss-resilient protocol.

Quantum Conference Key Agreement with Photon Loss