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There are a number of searchable encryption schemes that allow secure conjunctive keyword searches over encrypted data, but all of them assume that the position of the keywords is known. This is a pity, since in unstructured text, e.g. the body of an e-mail, this position is unknown and one has to construct O(m n ) search tokens for n keywords in a text of length m. In this paper we present a searchable encryption scheme that allows conjunctive keyword searches without specifying the positiondoi:10.1109/icnss.2011.6060016 dblp:conf/nss/Kerschbaum11 fatcat:lq7dyg37ibgadmd547ac4npqe4