标量积协议是构造隐私保持决策树的关键技术。

Scalar Product Protocol is the keystone in building privacy-preserving decision tree.

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但现在我要产生的，功率是力和速度，间的标量积。

But now the power that I have to generate is the dot product between the force and the velocity.

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同时与简单的标量积协议的性能相比较，协议4.1的性能是在合理的范围之内。

And comparing with the performance of simple Scalar Product Protocol without privacy preserving, the performance of Protocol 4.1 is acceptable.

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