Security issues and challenges in cloud

Cloud computing is emerging as a rapid growing technology in the IT industry. As a large amount of information on individuals and companies are placed in cloud, there is an ultimate need to ensure the safety of the cloud environment. The main issues concerned with cloud are security, privacy, reliability, legal issues, open standard, compliance, freedom, long term viability etc. The various security issues associated with cloud computing include privileged access, regulatory compliance, data location, data segregation, recovery, investigative support, data availability. The main requirements to ensure security in cloud are authorizing and authenticating users, data confidentiality, non-repudiation, availability. In this paper, security issues and challenges in various types and layers of cloud are discussed.