What is the MOST secure solution for the developer to use to migrate the automation code?
Remove the code that calls the STS AssumeRole operation. Use the same access key and secret key from the server to access the S3 bucket.
Remove the access key and the secret key. Use the STS AssumeRole operation to add permissions to access the S3 bucket.
Remove the access key, the secret key, and the code that calls the STS AssumeRole operation. Use an IAM instance profile role that grants access to the S3 bucket.
Remove the access key, the secret key, and the code that calls the STS AssumeRole operation. Create a new access key and secret key. Use the new keys to access the S3 bucket.
Explanations:
Using the same access key and secret key from the server compromises security because hardcoding credentials is not recommended, especially when moving to a more scalable solution like EC2. It exposes sensitive information.
While STS AssumeRole is a valid solution for temporary credentials, the IAM instance profile already grants appropriate permissions. Using STS AssumeRole in this case is unnecessary and adds complexity.
The most secure option is to remove the access keys and STS AssumeRole logic, relying on the IAM instance profile for authentication. The EC2 instance profile automatically manages temporary credentials, enhancing security.
Creating a new access key and secret key still involves managing sensitive credentials, which should be avoided. An IAM instance profile should be used instead for automatic role-based authentication.
I believe the answer is:
Remove the access key, the secret key, and the code that calls the STS AssumeRole operation. Use an IAM instance profile role that grants access to the S3 bucket.