Main Article Content
Cloud computing, recently, to provide individuals and companies with access to remote computing and storage infrastructure, is an important technology that has emerged. High availability to realize high-performance cloud services, data storage is dependent on data replication. However, providing a copy brings consistency problems. For data meets the increased requirements of a distributed application, because it is replicated to multiple geographically distributed data centers, many cloud data store so that such data-intensive operations can be performed with low latency to, and it has adopted a final consistency. This is the cost of obsolescence of data. We are and large-scale data group for efficient cloud processing and proposes a Data Consistency as a service (DCAAS) model consisting of a plurality of small audit cloud services. Third-Party Audit (TPA) techniques, using the mechanism of concealment methods to ensure a professional verification of the decryption algorithm, have been proposed. Therefore, a group of users to form TPA audit clouds will verify whether the data cloud provides a level of consistency of commitment. The proposed, role-based access control of TPA audit architecture needs to synchronize the clock in the audit the cloud, and it is recommended that use.