Abstract:We consider the problem of privately updating a message out of K messages from N replicated and non-colluding databases. In this problem, a user has an outdated version of the message Ŵθ of length L bits that differ from the current version W θ in at most f bits. The user needs to retrieve W θ correctly using a private information retrieval (PIR) scheme with the least number of downloads without leaking any information about the message index θ to any individual database. To that end, we propose a novel achiev… Show more
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