In this paper, we propose an efficient multiparty quantum direct secret sharing scheme based on Bell state and Bell measurements. In our scheme, the secret information can be directly encoded into the second particles of Bell states through the local unitary operations. In order to increase the number of participants, we use the controlled-NOT gate to produce the final multipartite entangled states. In the reconstruction phase, each participant performs Bell measurements for their particles and obtains the final key strings. Furthermore, they cooperate to recover the secret information. In addition, we give a concrete example with four participants to demonstrate more clearly the integrity of our scheme. Finally, we demonstrate that our protocol can resist both collusion attack and intercept-and-resend attack.

在本文中，我们提出了一种基于贝尔状态和贝尔测量的高效多方量子直接秘密共享方案。在我们的方案中，秘密信息可以通过局部酉操作直接编码到贝尔态的第二个粒子中。为了增加参与者的数量，我们使用受控非门来产生最终的多部分纠缠态。在重建阶段，每个参与者对其粒子进行贝尔测量并获得最终的关键字符串。此外，他们合作恢复秘密信息。此外，我们给出了一个有四个参与者的具体例子，以更清楚地展示我们方案的完整性。最后，我们证明了我们的协议可以抵抗共谋攻击和拦截重发攻击。