High-Efficient Syndrome-Based LDPC Reconciliation for Quantum Key Distribution
Haokun Mao, Yucheng Qiao, Qiong Li
Abstract
Quantum key distribution (QKD) is a promising technique to share unconditionally secure keys between remote parties. As an essential part of a practical QKD system, reconciliation is responsible for correcting the errors due to the quantum channel noise by exchanging information through a public classical channel. In the present work, we propose a novel syndrome-based low-density parity-check (LDPC) reconciliation protocol to reduce the information leakage of reconciliation by fully utilizing the syndrome information that was previously wasted. Both theoretical analysis and simulation results show that our protocol can evidently reduce the information leakage as well as the number of communication rounds.
Topics & Concepts
Low-density parity-check codeQuantum key distributionComputer scienceInformation leakageProtocol (science)Key (lock)Channel (broadcasting)Computer networkQuantumTheoretical computer scienceInformation theoryAlgorithmComputer securityDecoding methodsMathematicsPhysicsQuantum mechanicsStatisticsPathologyMedicineAlternative medicineQuantum Computing Algorithms and ArchitectureQuantum Information and CryptographyQuantum-Dot Cellular Automata