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Reconciliation is an important step to correct errors in Quantum KeyDistribution (QKD). In QKD, after comparing basis, two legitimate partiespossess two correlative keys which have some differences and they could obtainidentical keys through reconciliation. In this paper, we present a new ratecompatible reconciliation scheme based on Row Combining with Edge Variation(RCEV) Low Density Parity Check (LDPC) codes which could change code rateadaptively in noisy channel where error rate may change with time. Our schemeis easy to implement and could get good efficiency compared to existingschemes. Meanwhile, due to the inherent structure we use, the new scheme notonly saves memory space remarkably but also simplifies the decoder architectureand accelerates the decoding.

Easily Implemented Rate Compatible Reconciliation Protocol for Quantum Key Distribution