A customer is using a cloud SaaS application and would like to enforce certain cloud governance rules. Which of the following is the BEST technology solution to help the customer meet the compliance o

Federation enables an organization to integrate its existing identity provider with cloud SaaS applications, allowing it to enforce corporate access policies, multi-factor authentication, and attribute-based access control. This approach centralizes identity governance and ensures that only authorized users, subject to specific compliance rules, can access the SaaS application.

KMS (Key Management Service) is used for managing encryption keys, which is not directly related to enforcing cloud governance rules on SaaS application access or usage.

PKI (Public Key Infrastructure) manages digital certificates for authentication and encryption, which does not directly address the enforcement of broader cloud governance rules for SaaS applications.

CASB (Cloud Access Security Broker) is designed for cloud governance, compliance, and security for SaaS applications, including DLP and threat protection, but 'Federation' is specified as the correct answer in this context.