Cloud Computing Services and Security Challenges: A Review

An architecture of computing that provides services over the Internet on the demand anddesires of users that pay for the accessible resources that are shared is referred to as cloud computing.These resources are shared over the cloud, and users do not have to acquire them physically. Someshared resources are software, hardware, networks, services, applications and servers. Almost everyindustry, from hospitals to education, is moving towards the cloud to store data because of managingthe effective cost and time of organizing the resources physically in their space. Storage of data overthe data centers provided in the form of clouds is the key service of cloud computing. Users store theirdesired data on publicly available clouds over the Internet and away from their boundaries cost-effectively.Therefore, encryption is used to obscure the user's information before uploading or storing it tothe shared cloud devices. The main aim of the techniques is to provide security to user's data fromunauthorized and malicious intrusions.