What should the user do to meet this requirement?
Use AWS Secrets Manager.
Tag the objects in the S3 bucket.
Use security groups.
Use network ACLs.
Explanations:
AWS Secrets Manager is used for managing secrets such as API keys, passwords, and certificates, but it does not provide direct access control to S3 objects. It is not designed for restricting access to objects stored in S3.
Tagging objects in S3 can be used as a method for access control by implementing IAM policies that restrict access based on specific tags. This aligns with compliance requirements as it allows fine-grained control over who can access which objects based on their tags.
Security groups are primarily used for controlling inbound and outbound traffic to AWS resources such as EC2 instances. They do not apply to S3 buckets or objects within them, and therefore are not relevant for restricting access to S3 objects.
Network ACLs (Access Control Lists) are used to control traffic at the subnet level in VPCs. They do not directly restrict access to S3 objects and do not meet the compliance obligation for object-level access control in S3.
I sort that the answer is:
Tag the objects in the S3 bucket.