Dynamic quantum secret sharing between multiparty and multiparty based on single photons

Abstract

We propose a dynamic quantum secret sharing protocol between multiparty (m agents in group 1) and multiparty (n agents in group 2) based on single photons with the help of a third party. Compared with previous ones, our protocol has several improvements. Firstly, the quantum resources used in the protocol are merely single photons and local unitary operations, making it convenient to be implemented. Secondly, we do not need to verify the secret shares when adding agents, which simplifies the procedures. Finally, the security of the proposed protocol is improved. The attackers cannot get any effective information even if they have intercepted the sequences. At the same time, both two groups of agents could hold their own secret shares in privacy, which means they are not able to get each other’s secret shares.