Cloud Computing provide computation, software, data access, and storage resources without requiring cloud users to know the location and other details of the computing infrastructure. It is a technology that uses the internet and central remote servers to maintain data and applications. The main aim of this paper is to integrate cloud database service with data confidentiality and the possibility of executing concurrent operations on encrypted data i.e. to provide Secure Database as a Service (DBaaS). Here geographically distributed clients to connect directly to an encrypted cloud database, and to execute concurrent and independent SQL operations including those modifying the database structure. Data confidentiality is achieved by encrypting the data using Advance Encryption Standard (AES) algorithm. The proposed architecture has the further advantage of eliminating intermediate proxies that limit the elasticity, availability, and scalability properties that are intrinsic in cloud-based solutions.

Keywords : Cloud ,DBaaS, Confidentiality,Encryption.