The Cloud Security Alliance (CSA) is a nonprofit organization that promotes best practices for securing cloud computing environments. Founded in 2009, it aims to educate and guide organizations on how to protect their data and applications in the cloud. The CSA develops frameworks, tools, and resources to help businesses understand and mitigate cloud security risks. One of the CSA's key initiatives is the Security, Trust & Assurance Registry (STAR), which provides a publicly accessible registry of cloud service providers that have undergone security assessments. The CSA also collaborates with industry leaders and stakeholders to create standards and guidelines that enhance cloud security across various sectors.