Quantum Private Queries

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DATE : Wed, 12 Nov 2008 00:00:00 +0100
Entered in Database : 2008-11-11 23:00:00
length : 45490342
Link to the Show / Show Notes

Alice wants to ask Bob a question. Bob wants to give Alice the answer. But there's a catch: Alice doesn't want Bob to know what the question is. Classically, the only ways for Alice to make a provably private query are unwieldy. For example, Alice sends Bob a billion questions, of which her original question is one, and has him answer all of them. Quantum mechanically, however, Bob can answer Alice's question and provide her with a guarantee that he doesn't know what her question is. This talk shows how.

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