The provided sources focus on essential aspects of cloud computing and security risks/vulnerabilities that ought to be well understood, along with approaches and methods on how to tackle the threats. The authors investigate specific problem areas of verifying data integrity by third-party auditors for client data stored in cloud storage servers and propose optimized protocols resistant to replay, replace, and forge attacks initiated by malicious entities. Furthermore, the sources discuss privacy and security requirements of cloud-based electronic health records systems, identify influential factors in data security, protection, and ethics with respect to cloud computing, and propose new approaches such as Meta-Cloud Data Storage architecture for securing big data in the cloud environment. In summary, the chosen sources provide different approaches and insights on how to ensure cloud security, identifying, classifying, evaluating, and discussing various cloud security risks before proposing practical and conceptual approaches to mitigating and managing cloud security risks for diverse cloud computing environments.