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Order-preserving encryption (OPE) produces ciphertexts that preserve the relative order of the underlying plaintexts. Thus, it is very suitable for range queries over encrypted outsourced data, as it is a popular case in cloud database scenarios. Unfortunately, most schemes suffer from infeasibility in practice due to requirements like hardly maintainable(More)
Order-preserving encryption (OPE) allows encrypting without losing information about the order relation between the encrypted data items. Thus, the execution of compare, order and grouping operations can be done like on plaintext data. In particular it allows databases to do range queries over encrypted data, which is a useful feature especially for cloud(More)
Spaltenfamiliendatenbanken (engl.: „column family databases“ oder „wide column stores“) sind wegen ihres flexiblen Datenmodells beliebt, das eine weitgehend schemalose Datenverwaltung ermöglicht. Diese Datenbanken (insbesondere HBase und Cassandra als quelloffene Produkte) werden auch von einigen großen Cloud-Dienstanbietern als Database-as-a-Service(More)
In this paper we address the problem of fuzzy search over encrypted data that supports misspelled search terms. We advance prior work by using a bit vector for bigrams directly instead of hashing bigrams into a Bloom filter. We show that we improve both index building performance as well as retrieval ratio of matching documents while providing the same(More)