Data Security Issues in Distributed Cloud System?

Latest technology for better computation and security of data is cloud computing. The key feature of this technology is proving computing services through internet as pay per use to share storage, services, applications, networks without physical acquiring them. So that time taken to organize resources and managing cost reduces a lot. As the cloud is providing pay-per-use pattern on transactions carried, bandwidth used, data transfer, processing power consumed, storage space used many industries like health, libraries, government sector, banking, education etc are moving towards cloud computing. Different cloud providers like Google, Amazon, Microsoft, Salesforce.SOM etc are in the market for providing cloud computing services. There are different cloud deployment models available in market like community cloud, public cloud, private cloud, hybrid cloud. Service providers integrate building and supporting data centre hosts and offer different services like SaaS, PaaS, IaaS etc to the consumers, re-sellers .Cloud computer entirely depend on internet through which client can save his data in data sources and use them any time he need. Due to this security for the data which is stored by the user must be maintained. Reliability, interoperability, privacy, access level agreement must be ensured. This research paper includes basic understanding of cloud system, advantages of cloud system, security issues in cloud environment. Different concepts of security like firewalls, encryption, encoding, access policy etc are discussed in this paper.