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qxzhou1010 avatar qxzhou1010 commented on September 28, 2024

您好,您说的官方的资料具体指的是?

根据目前repo中的实现回答如下:

  1. 是为了获取PSIParams,其中包含的参数有 item_bit_count_min/max, ItemParams, TableParams, QueryParams......,APSI方案中包含的参数较多,此处就不一一列举了,请参考源码。
  2. “Setup Server DB”, 应该对应本repo实现中的 ISenderDB::SetData。不需要客户端公钥参与。
  3. OPRF是协议用来对Sender和Receive的原始keyword做处理的,和最后的真正的Label PSI 的计算是两件事情。

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coderSun20201112 avatar coderSun20201112 commented on September 28, 2024

老师,你好,我看到消息后,又重新看了《隐私计算学习笔记:第6讲 隐语PIR介绍及开发实践》(https://bbs.csdn.net/topics/618346089),同时结合自己的理解,又有几个问题想请教下:
Q1:服务端预处理(setup)阶段中,是不是只对prf前128bit求哈希,然后再对该哈希值求匹配多项式、插值多项式?
Q2:服务端预处理(setup)阶段中,将插值多项式系统packing到同态算法明文,这里提到的明文,就是明文,而不是密文,对吧?
Q3:客户端和服务端(query)阶段中,执行oprf协议,这里服务端应该传入一个密钥k,客户端传入一个x,最后客户端得到一个Fk(X),因此我想问一下这个服务端密钥k是来源于哪里?
Q4:客户端和服务端(query)阶段中,使用同态私钥解密,这里的同态私钥就是oprf的前128bit吗?
Q5:客户端和服务端(query)阶段中,使用oprf后128bit解密lable,这块能细说一下吗,因为我没见服务端是在哪个环节对lable加密的,同时,后端又是如何查询的?

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qxzhou1010 avatar qxzhou1010 commented on September 28, 2024

建议参考 https://github.com/microsoft/APSI 中 README 的介绍部分,可以对该方案有一个全面细致的理解。相比我直接告诉你答案,你自己探索并且回答能够学习到更多,也更深入。并且,非常期待你看完其中的介绍部分,能够回到这个issue,回答出你提出的这些问题。

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