Protecting Data Privacy in Private Information Retrieval Schemes Yael Gertner* Yuval Ishai t Eyal Kushilevitd Tal Malkid Abotract Private Information Retrieval (PIR) schemesallow a user to retrieve the i-th bit of a data string 2, replicated in k 2 2 databnaes (in the information-theoretic setting) or k 2 1 databnses (in the computational setting), while keeping the value of i private, The main cost measure for such a scheme io its communication complexity. In this paper we introduce a model of SymmetricallyPrivate Information Retrieval (SPIR), where the privacy of the data, aa well as of the user, is guaranteed. That is, in every invocation of a SPIR protocol, the user learns only a oingle (physical) bit of 2 and no other information about the data, Currently known PIR schemes fail to meet this goal. WC ahow how to transform PIR schemesinto SPIR schemes (with information theoretic privacy), paying at most a logarithmic factor in communication complexity. To this end, we introduce and utilize a new cryptographic primitive, denoted condilional disclosure of secrets, which we believe may be a useful building block for the design of more general crypto[Jraphic protocols. In particular, we get a k-database SPIR nchcme of
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera