Attribute-based queries over outsourced encrypted database

Abstract

With the rapid popularization of cloud computing, people began to store data in the cloud server, to avoid the cumbersome local data management and to get more convenient services. However, on one hand the cloud server cannot guarantee absolute security, as Hackers will use a variety of unexpected method to intrude the cloud server. On the other hand, the cloud server administrator may leak data in database, which may lead to serious consequence. The data can be stored in the form of ciphertext for the sake of protecting the privacy of user data. One efficient method to prevent data leakage is data encryption. However, this brings a range of problems. For example, in what ways the encrypted data which stored in the cloud server can be searched by authorized data users? Motivated by this question, we proposed Attribute-based Queries over Outsourced Encrypted Database. This method enables a data user, whose attributes satisfy one specific data owners access control policy, search over the data owners outsourced encrypted database.