A verifiable multi-party quantum key distribution protocol based on repetitive codes

A multi-party quantum key distribution protocol based on repetitive code is designed in this paper for the first time. First we encode classical sequence accordance with code. Then unitary transformation of state corresponding to encoded carried out by using parameters from (t, n) threshold protocol. Furthermore, derive two thresholds whether or not reserving measured values received sequence, and extract subkey conforming these conditions. This can authenticate identity participant, resist attack internal external participants, do need decoy particles when testing eavesdropper, which more efficient than similar protocols, also saves resources.