Journal of Computing
Interest in cloud computing market is growing rapidly in the recent years. It provides on-demand, high scalability computing resources with high availability and reliability. However, security is considered as one of the biggest obstacles for cloud computing. In this paper, the authors focus on the main security and privacy issues, pertinent to store and share data on untrusted cloud storage. They have investigated several existing approaches focused on security concerns in cloud computing. They classify the discussed studies based on three categories, which are: encryption and key management approaches, searching methods over encrypted data and access control schemes.