Abstract: To promote the execution efficiency of the blind quantum computation protocol and to reduce the time clients occupy on the quantum server, this study proposes a two-server blind quantum computation protocol based on Bell-and W-state entanglement swapping, as well as the actual network environment. According to this protocol, a computation task is divided into two parts, which can be accomplished by Bob1 and Bob2 to follow single-server blind quantum computation procedures, respectively. Compared with the single-server BQC, this protocol does not increase extra input in quantum server resources, because the preparation of Brick word State quantum bits for the construction of two servers can be achieved by a single quantum computer and following one preparation process. The proposed protocol makes complete classic realization at the client’s terminal to reality and is unconditionally safe.

Key words: quantum computing, blind quantum computation, entanglement swapping, trusted center；quantum network, unconditional security

摘要： 结合实际的网络环境，为提高盲量子计算协议的执行效率和减少客户端占用量子服务器的时间，利用Bell态与W态的纠缠交换原理，提出了一种适用网络的双服务器盲量子协议方案。方案中客户端将计算任务分为两部分，并分别与Bob1和Bob2按照单服务器盲量子计算步骤执行完成。因为制备分别用于构造两台量子服务器中砖墙态的量子比特，只由一台量子计算机、执行一次制备过程就可以完成，与单服务器BQC相比并没有增加额外的量子服务器资源投入。方案可以实现客户端完全经典，协议具有无条件安全性。

关键词: 量子计算, 盲量子计算, 量子纠缠, 可信任中心, 量子网络, 无条件安全