A Study of Cloud Computing, Its Issues and Encryption

Cloud computing is the dynamic delivery of information technology resources and capabilities as a service over the Internet. Cloud computing is a style of computing in which dynamically scalable and often virtualized resources are provided as a service over the Internet. Virtualization is the core concept supported in the cloud computing. Resources are provided to the cloud users in a virtualized manner. Cloud providers are maintaining the user's data in cloud environment. The data which is stored in the provider's server could cause security and privacy issue in cloud storage. Lots of research is going on to provide security to the user's data. Leakage of user's con�dential information stored in the database can cause disaster; hence there is a need of extra layer of security for the con�dential information. Since the database is stored in a third party server, there is a need to prevent the exposure of information to the datacenter owner. There are many encryption techniques are used to protect the data in cloud.