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What is the role of AWS KMS in securing sensitive data?

Cloud/Toolseasy0.4 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in Cloud/Tools
Difficulty Split
104E|27M|48H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Nielsen
Expert AnswerPremium
72 wordsInterview-ready
**KMS role**: Centralized key management. Creates and controls encryption keys. Used by S3, EBS, RDS, Lambda for encryption. **Why KMS**: Key lifecycle (creation, rotation, deletion); audit via CloudTrail; access control via IAM. **CMK**: Customer-managed keys—you control policy and rotation. AWS-managed keys are simpler but less control. **Best practice**: Use CMK for compliance (audit trail). Enable automatic rotation (annual for symmetric). **Cost**: $1/month per key; $0.03/10K requests....
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