Protocols for Secure Remote Database Access with Approximate Matching

Suppose that Bob has a databaseDand that Alice wants to perform a search queryqonD(e.g., “isqinD?”).Since Alice is concerned about her privacy, she does not want Bob to know the queryqor the response to the query. How could this be done? There are elegant cryptographic techniques for solving this problem under various constraints (such as “Bob should know neitherqnor the answer to the query” and “Alice should learn nothing aboutDother than the answer to the query”), while optimizing various performance criteria (e.g., amount of communication).

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