Cloud computing is an umbrella term used to refer to Internet based development and services. It offers users the ability to connect to computing resources and access IT managed services with a previously unknown level of ease. Due to this greater level of flexibility, the cloud has become the breeding ground of a new generation of products and services. However, the flexibility of cloud-based services comes with the risk of the security and privacy of users’ data. Thus, security concerns among users of the cloud have become a major barrier to the widespread growth of cloud computing. One of the security concerns of cloud is data mining based privacy attacks that involve analyzing data over a long period to extract valuable information. In this paper, we first identify the data mining based privacy risks on cloud data and propose a distributed architecture to eliminate the risks in Rain-cloud environment.