A Cloud Security Access Broker (CASB) acts as an intermediary between an organization’s on-premises infrastructure and the cloud and provides a layer of security by enforcing enterprise security policies and ensuring compliance when users access cloud-based applications.

It provides visibility and control over data across multiple cloud environments, offering protection against security risks like data leaks, unauthorized access, and malware.

CASBs typically offer features such as data encryption, threat protection, access controls, and activity monitoring which enable organizations to ensure compliance with regulatory requirements by tracking how data is stored, shared, and accessed in the cloud as well as to protect against malware.