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A Comment on Privacy-Preserving Scalar Product Protocols as Proposed in “SPOC”

机译:关于“ SPOC”中提议的保护隐私的标量产品协议的评论

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Privacy-preserving scalar product (PPSP) protocols are an important building block for secure computation tasks in various applications. Lu et al. (TPDS13) introduced a PPSP protocol that does not rely on cryptographic assumptions and that is used in a wide range of publications to date. In this comment paper, we show that Lu et al.s protocol is insecure and should not be used. We describe specific attacks against it and, using impossibility results of Impagliazzo and Rudich (STOC89), show that it is inherently insecure and cannot be fixed without relying on at least some cryptographic assumptions.
机译:隐私保护标量产品(PPSP)协议是各种应用程序中安全计算任务的重要组成部分。 Lu等。 (TPDS13)引入了PPSP协议,该协议不依赖于加密假设,并且迄今为止已在许多出版物中使用。在这篇评论文章中,我们表明Lu等人的协议是不安全的,不应使用。我们描述了针对它的特定攻击,并使用Impagliazzo和Rudich(STOC89)的不可能结果显示,它本质上是不安全的,如果不依赖至少一些密码假设,就无法修复。

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