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Private searching on streaming data allows a user to collect potentially useful information from huge streaming sources of data without revealing his or her searching criteria. This technique can be used for airports, without knowing a classified "Possible terrorists" list, to find if any of hundreds of passenger lists has a name from the "Possible terrorists" list and if so his/hers itinerary. Current solutions for private searching on streaming data only support searching for "OR" of keywords or "AND" of two sets of keywords.
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