This research paper focuses on the security threats related to cloud computing and preventive measures to tackle them. It discusses the problems with cloud computing such as security, trust, compliance, governance, incident response, data protection, copyright, data portability, and privacy breaches. It also mentions various countermeasures to leverage the concerns related to security such as architecture security, data security, using Mirage Image Management System, using Client Based Privacy Manager, Transparent Cloud Protection, SQL and XSS injection attacks, Confronting Abuse and Nefarious Use of Cloud Computing and Confronting Account, Service & Traffic Hijacking.