Abstract
Due to non-ideal conditions in the measurements of the channel, high initial bit mismatch rate in the secret key generation is resulted, which reduces the final secret key generation rate and even causes the secret key generation process to fail. Aiming at this problem, a pre-process method that makes the initial bit mismatch rate come down quickly is proposed in this paper. Simulation results show that the new pre-process method has excellent ability of reducing the initial b it mismatch rate, especially in the case of very high initial bit mismatch rate. The data remaining rate is improved by more than thirty-seven times when the initial bit mismatch rate is 0.3.
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