Abstract
Cloud computing is a technology that facilitates numerous configurable resources in which the data is stored and managed in a decentralized manner. However, since the data is out of the owner's control, concerns have arisen regarding data confidentiality. Encryption techniques have previously been proposed to provide users with confidentiality in terms of outsource storage; however, many of these encryption algorithms are weak, enabling data security to be breached simply by compromising an algorithm. We propose a combination of encryption algorithms and a distribution system to improve database confidentiality. This scheme distributes the database across the clouds based on the level of security that is provided by the encryption algorithms utilized. We analyzed our scheme by designing and conducting experiments and by comparing our scheme with existing solutions. The results demonstrate that our scheme offers a highly secure approach that provides users with data confidentiality and provides acceptable overhead performance.