Institute of Electrical and Electronics Engineers
In past three decades, the world of computation has changed from centralized (client-server not web-based) to distributed systems and now the authors are getting back to the virtual centralization (Cloud Computing). Location of data and processes makes the difference in the realm of computation. On one hand, an individual has full control on data and processes in his/her computer. On the other hand, they have the cloud computing wherein, the service and data maintenance is provided by some vendor which leaves the client/customer unaware of where the processes are running or where the data is stored.