Quick Answer
The answer is AWS Key Management Service (KMS). KMS is the correct choice because it is a fully managed service purpose-built for creating, storing, and managing the encryption keys that protect your data across AWS services like S3, EBS, and RDS, offering automatic key rotation, fine-grained access control through IAM and key policies, and integration with CloudTrail for auditing every key usage. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding of the fundamental distinction between a managed key service and a dedicated hardware security module; a common trap is confusing KMS with CloudHSM, but remember that KMS handles key management for the vast majority of AWS services, while CloudHSM gives you sole control over the underlying hardware for regulatory or custom cryptographic workloads. For a quick memory tip, think of KMS as the “key concierge” that manages keys for you, whereas CloudHSM is the “key vault” you personally lock and guard.
This SCS-C02 practice question tests your understanding of management and security governance. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which AWS service allows you to create and manage encryption keys for your AWS resources?
AWS CloudHSM
Why wrong: CloudHSM is for hardware security modules.
AWS Key Management Service (KMS)
KMS is for encryption keys.
AWS Certificate Manager
Why wrong: Certificate Manager is for SSL/TLS certificates.
AWS Secrets Manager
Why wrong: Secrets Manager is for secrets.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
AWS Key Management Service (KMS)
AWS Key Management Service (KMS) is the managed service designed specifically for creating, storing, and managing encryption keys used to encrypt data across AWS services. It integrates with AWS CloudTrail for auditing key usage and supports symmetric and asymmetric keys, with automatic key rotation and fine-grained access control via IAM and key policies.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS CloudHSM
Why it's wrong here
CloudHSM is for hardware security modules.
AWS Key Management Service (KMS)
Why this is correct
KMS is for encryption keys.
Related concept
Read the scenario before looking for a memorised answer.
AWS Certificate Manager
Why it's wrong here
Certificate Manager is for SSL/TLS certificates.
AWS Secrets Manager
Why it's wrong here
Secrets Manager is for secrets.
Common exam traps
The trap here is that candidates confuse AWS CloudHSM (a dedicated hardware security module) with KMS, not realizing that CloudHSM requires manual management and does not natively integrate with AWS services for automatic encryption, whereas KMS is the fully managed key creation and management service.
Detailed technical explanation
KMS uses FIPS 140-2 validated hardware security modules (HSMs) to protect key material, and each customer master key (CMK) is backed by a unique key ID that never leaves the service. Under the hood, KMS supports envelope encryption, where a CMK encrypts a data key that is then used to encrypt actual data, allowing efficient encryption of large objects while keeping the CMK secure. A real-world scenario is using KMS with S3 server-side encryption (SSE-KMS) to enforce per-bucket key policies and audit every decryption request via CloudTrail.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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FAQ
Management and Security Governance — This question tests Management and Security Governance — Read the scenario before looking for a memorised answer..
The correct answer is: AWS Key Management Service (KMS) — AWS Key Management Service (KMS) is the managed service designed specifically for creating, storing, and managing encryption keys used to encrypt data across AWS services. It integrates with AWS CloudTrail for auditing key usage and supports symmetric and asymmetric keys, with automatic key rotation and fine-grained access control via IAM and key policies.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SCS-C02 exam.
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