Which AWS service can a company use to log all key usage to meet regulatory requirements?

AWS CloudTrail is the correct service for logging all key usage to meet regulatory requirements. It provides a comprehensive way to track and log actions taken by users, roles, or services across an AWS account. With CloudTrail, every API call is recorded, including those related to the use of encryption keys stored in AWS Key Management Service (KMS). This logging capability not only supports compliance and auditing by maintaining records of who accessed what and when but also enhances security by allowing organizations to monitor the use of sensitive operations related to encryption keys.

This level of detailed auditing is essential for organizations that need to adhere to various regulatory standards, such as GDPR or HIPAA, where documentation of access and actions taken on sensitive data is critical. CloudTrail helps facilitate this by integrating seamlessly with AWS services, continuously recording and storing logs that can be reviewed whenever necessary.

In contrast, while AWS Config monitors and tracks configuration changes within AWS resources, it does not focus specifically on logging API calls. AWS CloudWatch primarily deals with monitoring resource performance and operational health rather than logging actions. AWS Inspector is a security assessment service that helps improve the security and compliance of applications but does not provide logging for key usage. Thus, CloudTrail stands out as the dedicated tool for logging API activity,