Private Large-Scale Databases with Distributed Searchable Symmetric Encryption

With the growing popularity of remote storage, the ability to outsource a large private database yet be able to search on this encrypted data is critical. Searchable symmetric encryption (SSE) is a practical method of encrypting data so that natural operations such as searching can be performed on this data. It can be viewed as an efficient private-key alternative to powerful tools such as fully homomorphic encryption, oblivious RAM, or secure multiparty computation. The main drawbacks of existing SSE schemes are the limited types of search available to them and their leakage. In this paper, we present a construction of a private outsourced database in the two-server model (e.g. two cloud services) which can be thought of as an SSE scheme on a B-tree that allows for a wide variety of search features such as range queries, substring queries, and more. Our solution can hide all leakage due to access patterns (“metadata”) between queries and features a tunable parameter that provides ...

• Type: Journal
• Year: 2016
• Where: CTRSA
• Authors: Yuval Ishai, Eyal Kushilevitz, Steve Lu, Rafail Ostrovsky
• Keywords: Cryptology, CTRSA 2016