Query Processing on Encrypted Data in the Cloud by

This paper explores a new encryption technique called POP. POP addresses the need to encrypt databases in the cloud and to execute complex SQL queries on the encrypted data efficiently. POP can be configured to meet different privacy requirements and attacker scenarios. Two such scenarios, referred to as domain attack and frequency attack, are studied in detail in this paper. Privacy and performance experiments conducted using the TPC-H benchmark show that POP makes it indeed possible to achieve good privacy with affordable performance overheads in many cases.