Quantum Secret Sharing Using Symmetric W State

Quantum secret sharing (QSS) is an important branch of quantum cryptography, but the existing literature contains no mention of a QSS scheme that applies in the symmetric W states. Here, we demonstrate a multipartite QSS protocol that is encoded into these quantum states with unitary operation pairs. This paper proposes a new method of constructing a QSS protocol for the symmetric W state. This scheme is more efficient than other existing QSS schemes because our proposed protocol uses only a single photon measurement and XOR to recover the secret KEY of Alice.