Data Security for Virtual Data Centers by Commutative Key

The maintenance cost of a Data Center (In Small Organizations) is very high and difficult also. So an economically better choice is to use cloud computing and cloud storage instead of manage data centers by itself. But in Cloud Storage, Cloud user’s sensitive data is in the control of a third party. Here the customer can’t trust the Cloud Storage. But Cloud storage providers’ claims that they can protect the data, but no one believe them. So this paper presents a framework to ensure data security in cloud storage system. In this framework, we use Commutative property, Bitwise XOR for managing keys between cloud storage and customer. And UNICODE and Colors for encrypt and decrypt the data both in cloud storage and customer’s system.