Transmission device, reception device, quantum key distribution method, and quantum key distribution program for quantum key distribution system

摘要

The quantum key distribution device includes an encoding unit that encodes an optical pulse train, and N types (N is an integer of 3 or more) of intensity modulation with different strengths at different timings on the encoded optical pulse sequence. A first key distillation process for generating an encryption key based on a data sequence obtained by removing data obtained from an optical pulse having a specific modulation pattern from a data sequence used in a modulation unit and the encoding unit and the intensity modulation unit A section.