Efficient Multiparty Quantum Secret Sharing Scheme in High-Dimensional System

摘要

Quantum secret sharing (QSS) is an important component of quantum cryptograph. The original QSS scheme was proposed based on entangled GHZ states. But a drawback of the scheme is that only half of the quantum resource is effective, and the other half has to be discarded. To enhance the efficiency of the scheme, we propose an efficient multiparty QSS scheme and generalized it in high-dimensional system. By using a measurement-delay strategy on the dealer's side, the efficiency of the improved QSS schemes can be raised to 100%, rather than 50% or 1/d in previous schemes.