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Secure mediation of join queries by processing ciphertexts

: Biskup, J.; Tsatedem, C.; Wiese, L.


Institute of Electrical and Electronics Engineers -IEEE-:
2007 IEEE 23rd International Conference on Data Engineering. Workshops proceedings. Vol.2 : 17 - 20 April, 2007, Istanbul, Turkey
Piscataway, NJ: IEEE, 2007
ISBN: 1-424-40831-8
ISBN: 978-1-424-40831-3
ISBN: 1-4244-0832-6
ISBN: 978-1-4244-0832-0
International Conference on Data Engineering (ICDE) <23, 2007, Istanbul>
Fraunhofer SCAI ()

In a secure mediated information system, confidentiality is one of the main concerns when transmitting data from datasources to clients via a mediator. We present three approaches that allow a mediator to compute a JOIN operation on encrypted relations; each approach uses a different encryption scheme. We adapt these schemes to the mediator architecture and provide a comprehensive description of the resulting protocols. A first security analysis is also given.