Proposed solution for non-textual data: Previous research on querying encrypted relational db (H.Hacigumus et al.)‏ Given a relation R, the data owner divides the domain of each attribute into distinguished partitions, to which it assigns a different id For each encrypted tuple, the provider receives also the partition ids of each of its attributes The provider is able to perform queries directly on the encrypted tuples, by exploiting the partitioning ids Quering XML encrypted data content-dep.
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