ObliviousDB: Practical and efficient searchable encryption with controllable leakage

Abstract

Searchable encryption allows users to execute encrypted queries over encrypted databases. Several encryption schemes have been proposed in the literature but they leak sensitive information that could lead to inference attacks. We propose ObliviousDB, a searchable encryption scheme for an outsourced database that limits information leakage. Moreover, our scheme allows users to execute SQL-like queries on encrypted data and efficiently supports multi-user access without requiring key sharing. We have implemented ObliviousDB and show its practical efficiency.