DEA-C01 Data Security and Governance Practice Question

Exhibit

{
  "Effect": "Allow",
  "Action": [
    "kms:Decrypt",
    "kms:ReEncrypt*",
    "kms:GenerateDataKey*"
  ],
  "Resource": "*",
  "Condition": {
    "ForAnyValue:StringLike": {
      "kms:ViaService": [
        "s3.*.amazonaws.com"
      ]
    }
  }
}

Refer to the exhibit. A data engineer creates an IAM policy for a service role used by AWS Glue. What does the condition in the policy enforce?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The role can only use the KMS key when the request comes from S3

The condition uses the `kms:ViaService` key with value `s3.amazonaws.com`, which restricts KMS actions to requests originating from Amazon S3. Therefore, the role can only use the KMS key when the request comes from S3, making option D correct. Option A is incorrect because it does not allow any service; option B is incorrect because it specifies Glue instead of S3; option C is incorrect because it limits to decrypting only, but the condition does not specify the action.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
The role can use the KMS key from any AWS service
Why it's wrong here
Restricted to S3.
✗
The role can only use the KMS key when the request comes from Glue
Why it's wrong here
Condition is for S3, not Glue.
✗
The role can only use the KMS key for decrypting data
Why it's wrong here
Policy also allows ReEncrypt and GenerateDataKey.
✓
The role can only use the KMS key when the request comes from S3
Why this is correct
kms:ViaService limits to S3 endpoints.

Quick reference

AWS S3 Storage Class Comparison

Storage Class	Min Duration	Retrieval	Use Case
S3 Standard	None	Immediate	Frequently accessed data
S3 Standard-IA	30 days	Immediate	Infrequent access, rapid retrieval
S3 One Zone-IA	30 days	Immediate	Non-critical infrequent data
S3 Intelligent-Tiering	None	Immediate–hours	Unknown or changing access patterns
S3 Glacier Instant	90 days	Milliseconds	Archive with instant retrieval
S3 Glacier Flexible	90 days	Minutes–hours	Archive, flexible retrieval
S3 Glacier Deep Archive	180 days	Hours	Long-term compliance archive

Go deeper

DEA-C01 Data Security and Governance Practice Question

Exhibit

Why each option matters

Option-by-option breakdown

AWS S3 Storage Class Comparison

Related to this question