AWS Certified Security – Specialty (SCS-C02) — Question 134

A company is using an AWS Key Management Service (AWS KMS) AWS owned key in its application to encrypt files in an AWS account. The company's security team wants the ability to change to new key material for new files whenever a potential key breach occurs. A security engineer must implement a solution that gives the security team the ability to change the key whenever the team wants to do so.

Which solution will meet these requirements?

Answer options

• A. Create a new customer managed key. Add a key rotation schedule to the key. Invoke the key rotation schedule every time the security team requests a key change.
• B. Create a new AWS managed key. Add a key rotation schedule to the key. Invoke the key rotation schedule every time the security team requests a key change.
• C. Create a key alias. Create a new customer managed key every time the security team requests a key change. Associate the alias with the new key.
• D. Create a key alias. Create a new AWS managed key every time the security team requests a key change. Associate the alias with the new key.

Correct answer: C

Explanation

Option C is correct because it allows the security team to create a new customer managed key whenever they need to change the key material, and the alias can be updated to point to the new key. Options A and B involve using a key rotation schedule, which does not provide the immediate manual control needed for changing keys on demand. Option D uses an AWS managed key, which does not offer the same level of customization and control as a customer managed key.