Source host proceeds as Alice, and multiple hosts proceed as Bob. Each host contributes the part of encrypted circuit representing its function, and thus the resulting encrypted circuit is a cascade of sub-circuits.

• 以源主机充当Alice，多个主机充当Bob，所有主机贡献出加密电路当中代表自己函数的部分，各个子电路进行级联，从而构造出最终的加密电路。