Secure Mediation of Join Queries by Processing Ciphertexts

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. Key words: secure mediation, confidentiality, credential based access control, encrypted data processing, database as a service, commutative encryption, homomorphic encryption

• Type: Conference
• Year: 2007
• Where: ICDE
• Authors: Joachim Biskup, Christian Tsatedem, Lena Wiese
• Keywords: Credential Based Access, Database, ICDE 2007, Secure Mediated Information, first Security Analysis