作者
Alexander Vardy, Eitan Yaakobi
发表日期
2023/7/12
期刊
IEEE Journal on Selected Areas in Information Theory
出版商
IEEE
简介
Private information retrieval (PIR) protocols allow a user to retrieve a data item from a database without revealing any information about the identity of the item being retrieved. Specifically, in information-theoretic -server PIR, the database is replicated among non-communicating servers, and each server learns nothing about the item retrieved by the user. The effectiveness of PIR protocols is usually measured in terms of their communication complexity, which is the total number of bits exchanged between the user and the servers. However, another important cost parameter is storage overhead, which is the ratio between the total number of bits stored on all the servers and the number of bits in the database. Since single-server information-theoretic PIR is impossible, the storage overhead of all existing PIR protocols is at least 2 (or , in the case of -server PIR). In this work, we show that information-theoretic PIR can be achieved with storage overhead arbitrarily close to …
引用总数
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学术搜索中的文章
A Fazeli, A Vardy, E Yaakobi - 2015 IEEE International Symposium on Information …, 2015