What is the benefit of using AWS Managed CMK?

Using AWS Managed Customer Master Keys (CMK) offers the significant advantage of having AWS manage the key lifecycle and security for you. This provides peace of mind by reducing the operational burden associated with key management. AWS takes care of critical activities such as key creation, rotation, and deletion, as well as implementing security best practices around these keys.

By relying on AWS for these functions, organizations can ensure that their encryption keys are handled with high levels of security and compliance with industry standards. This allows teams to focus more on their core tasks without having to worry about the intricacies of key management, which can often lead to vulnerabilities if not handled properly.

The choices that are not selected do not capture this essential aspect of AWS Managed CMKs. For example, while full user control over key policies is valuable, it’s pertinent to environments where you specifically need to tailor access and permission closely. Integration with third-party security tools and custom key storage solutions may offer flexibility but do not encapsulate the primary benefit of reduced management overhead and increased security provided by AWS.