Error-Correction Method Based on LDPC for Quantum Key Distribution Systems

Abstract

We proposed an efficient error correction method for QKD systems using optimal LDPC check matrix. We divide sifted keys into 50 multiple parts, and each part creates syndrome using optimal check matrix. With this syndrome we have corrected the error of the sifted keys. By the proposed algorithm, we can correct less than 3 errors in each part of the sifted keys. The simulation results show that the error correction is performed efficiently.