Dynamic quantum secret sharing

In this Letter we consider quantum secret sharing (QSS) between a sender and a dynamic agent group, called dynamic quantum secret sharing (DQSS). In the DQSS, the change of the agent group is allowable during the procedure of sharing classical and quantum information. Two DQSS schemes are proposed based on a special kind of entangled state, starlike cluster states. Without redistributing all the shares, the changed agent group can reconstruct the senderʼs secret by their cooperation. Compared with the previous quantum secret sharing scheme, our schemes are more flexible and suitable for practical applications.

► We consider quantum secret sharing between a sender and a dynamic agent group, called dynamic quantum secret sharing (DQSS).
► In the DQSS, the change of the agent group is allowable during the procedure of sharing classical and quantum information.
► Two DQSS schemes are proposed based on a special kind of entangled state, starlike cluster states.
► Without redistributing all the shares, the changed agent group can reconstruct the senderʼs secret by their cooperation.
► Compared with the previous quantum secret sharing scheme, our schemes are more flexible and suitable for practical applications.