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The authors introduce mechanisms for secure keyword searches on a document server. They propose protocols with computational privacy, query correctness assurances and minimal or no leaks: the server either correctly executes client queries or (if it behaves maliciously) is immediately detected. The client is then provided with strong assurances proving the authenticity and completeness of server replies. This is different from existing research efforts, where a cooperating, non-malicious server behavior is assumed. They also strengthen the privacy guarantees.
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