Which combination of steps should the solutions architect take to meet these requirements?

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A digital marketing company has multiple AWS accounts that belong to various teams.The creative team uses an Amazon S3 bucket in its AWS account to securely store images and media files that are used as content for the company’s marketing campaigns.The creative team wants to share the S3 bucket with the strategy team so that the strategy team can view the objects.A solutions architect has created an IAM role that is named strategy_reviewer in the Strategy account.The solutions architect also has set up a custom AWS Key Management Service (AWS KMS) key in the Creative account and has associated the key with the S3 bucket.However, when users from the Strategy account assume the IAM role and try to access objects in the S3 bucket, they receive an Access Denied error.The solutions architect must ensure that users in the Strategy account can access the S3 bucket.The solution must provide these users with only the minimum permissions that they need.

Which combination of steps should the solutions architect take to meet these requirements?

(Choose three.)

Create a bucket policy that includes read permissions for the S3 bucket. Set the principal of the bucket policy to the account ID of the Strategy account.

Update the strategy_reviewer IAM role to grant full permissions for the S3 bucket and to grant decrypt permissions for the custom KMS key.

Update the custom KMS key policy in the Creative account to grant decrypt permissions to the strategy_reviewer IAM role.

Create a bucket policy that includes read permissions for the S3 bucket. Set the principal of the bucket policy to an anonymous user.

Update the custom KMS key policy in the Creative account to grant encrypt permissions to the strategy_reviewer IAM role.

Update the strategy_reviewer IAM role to grant read permissions for the S3 bucket and to grant decrypt permissions for the custom KMS key.

Explanations:

A bucket policy is required to allow access from another account. Setting the principal to the Strategy account ID allows cross-account access specifically for users from that account.

Granting full permissions for the S3 bucket would exceed the minimum permissions required. Only read permissions for the S3 bucket and decrypt permissions for the KMS key are needed.

The KMS key policy must explicitly grant decrypt permissions to thestrategy_reviewerIAM role in the Strategy account to allow access to encrypted objects.

Setting the principal to an anonymous user would make the bucket accessible to anyone, violating the minimum permissions requirement.

Encrypt permissions are not needed for users in the Strategy account since they only need to view (decrypt) objects in the bucket, not to create or modify them.

Thestrategy_reviewerIAM role must have read permissions for the S3 bucket and decrypt permissions for the KMS key to meet the minimum permissions required for viewing objects.

2025-10-16

1 Comment

  1. Wayne
    Author

    It appears that the answer is:
    Create a bucket policy that includes read permissions for the S3 bucket. Set the principal of the bucket policy to the account ID of the Strategy account.

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