The Capacity of Private Information Retrieval With Partially Known Private Side Information
نویسندگان
چکیده
منابع مشابه
Private Information Retrieval with Partially Known Private Side Information
We consider the problem of private information retrieval (PIR) of a single message out of K messages from N replicated and non-colluding databases where a cache-enabled user of cache-size M messages possesses side information in the form of full messages that are partially known to the databases. In this model, the user and the databases engage in a two-phase scheme, namely, the prefetching pha...
متن کاملThe Capacity of Private Information Retrieval with Partially Known Private Side Information
We consider the problem of private information retrieval (PIR) of a single message out of K messages from N replicated and non-colluding databases where a cacheenabled user (retriever) of cache-size M possesses side information in the form of full messages that are partially known to the databases. In this model, the user and the databases engage in a two-phase scheme, namely, the prefetching p...
متن کاملThe Capacity of Private Information Retrieval with Private Side Information
The problem of private information retrieval with private side information (PIR-PSI) is recently introduced by Kadhe et al. In this problem, N replicated databases each store K messages, of which M are known to the user as side-information. The identity of these M messages is unknown to the databases. The user wishes to retrieve, as efficiently as possible, a new desired message without reveali...
متن کاملCache-Aided Private Information Retrieval with Partially Known Uncoded Prefetching
We consider the problem of private information retrieval (PIR) from N non-colluding and replicated databases, when the user is equipped with a cache that holds an uncoded fraction r from each of the K stored messages in the databases. This model operates in a two-phase scheme, namely, the prefetching phase where the user acquires side information and the retrieval phase where the user privately...
متن کاملPrivate Information Retrieval with Side Information
We study the problem of Private Information Retrieval (PIR) in the presence of prior side information. The problem setup includes a database of K independent messages possibly replicated on several servers, and a user that needs to retrieve one of these messages. In addition, the user has some prior side information in the form of a subset of M messages, not containing the desired message and u...
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ژورنال
عنوان ژورنال: IEEE Transactions on Information Theory
سال: 2019
ISSN: 0018-9448,1557-9654
DOI: 10.1109/tit.2019.2936023