Primary Methods to Address the Data Security Problems in Cloud Computing

Cloud computing is a service to deliver the hosted services over the network. This technology makes companies utilize the resources as a service rather than building on their own. It has many advantages like: on demand self service, elasticity, and pay per use by giving public cloud, private cloud, hybrid cloud and community clouds as deployment models and SaaS, PaaS and IaaS as service models. On the other hand, data security, data privacy, limited control over the service, data location, vendor lock-in and downtime are the basic challenges in cloud computing. The primary methods to address the data security problem are encryption and Consistency as a Service (CaaS). Encryption ensures securing the data present in cloud server. Even though many encryption techniques are available attribute based encryption gives better results. It provides an access control by using private key, master key and cipher text. Key-policy attribute-based encryption and attribute-based encryption using hash functions are giving secure results. In CaaS, a group of users, namely, audit cloud and cloud service providers, together frequently check the cloud consistency