A Simpler Rate-Optimal CPIR Protocol
A Simpler Rate-Optimal CPIR Protocol
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一种更简单的速率最优 CPIR 协议
DOI:
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发表时间:
2017
期刊:
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通讯作者:
K. Pavlyk
中科院分区:
文献类型:
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作者:
H. Lipmaa;K. Pavlyk
In PETS 2015, Kiayias, Leonardos, Lipmaa, Pavlyk, and Tang proposed the first (n, 1)-CPIR protocol with rate (1 - o (1)). They use advanced techniques from multivariable calculus (like the Newton-Puiseux algorithm) to establish optimal rate among a large family of different CPIR protocols. It is only natural to ask whether one can achieve similar rate but with a much simpler analysis. We propose parameters to the earlier (n, 1)-CPIR protocol of Lipmaa (ISC 2005), obtaining a CPIR protocol that is asymptotically almost as communication-efficient as the protocol of Kiayias et al. However, for many relevant parameter choices, it is slightly more communication-efficient, due to the cumulative rounding errors present in the protocol of Kiayias et al. Moreover, the new CPIR protocol is simpler to understand, implement, and analyze. The new CPIR protocol can be used to implement (computationally inefficient) FHE with rate (1 - o (1)).