Cloud computing delivers convenient, on-demand access to shared pools of data, applications and hardware over the internet. Cloud computing provides unlimited infrastructure to store and execute customer data and program. As customers the authors do not need to own the infrastructure, they are merely accessing or renting; they can forego capital expenditure and consume resources as a service, paying instead for what they use. Data can be redundantly store in multiple physical locations. Due to this redundancy the data can be easily modified by unauthorized users which can be stored in the database. This leads to loss of data privacy and security to database.