This report delves into the critical aspects of information security within the realm of cloud computing. It begins with an overview of cloud computing, highlighting its significance in modern technology and the various technologies that underpin its functionality, such as virtualization, Service-Oriented Architecture (SOA), grid computing, and utility computing. The report then identifies and analyzes major security threats, including Distributed Denial-of-Service (DDoS) attacks, system vulnerabilities, phishing and social engineering, data loss and inadequate backups, shared cloud computing service issues, and employee negligence. Following the threat analysis, the report proposes several countermeasures to mitigate these risks, such as data and information encryption, system vulnerability mitigation, identification of current cloud computing attacks, and the establishment of multifactor authentication systems. The report concludes by emphasizing the need for continuous research and improvement in cloud security to address emerging threats and maintain the integrity and reliability of cloud computing environments.