Ensuring data confidentiality in cloud computing: an encryption and trust-based solution

With the rapid development of cloud computing, more users are attracted by its powerful and cost-efficient computation capability. However, whether CSPs can effectively protect CSUs´ data confidentiality remains a challenging issue. In this work, we aim at ensuring data confidentiality in the cloud environment by enabling CSUs to (1) encrypt their sensitive data and perform data correctness verification from time to time, (2) evaluate the trustworthiness of CSP, and (3) determine whether to allow CSPs to perform diverse computation services according to their trust values. The proposed solution, which integrates the encryption and trust based techniques, has achieved the above design goals.