To enable server-side encryption for S3 objects, you can follow these steps:
Go to the AWS Management Console and navigate to the S3 service.
Click on the bucket where you want to enable server-side encryption for the objects.
Click on the "Properties" tab.
Under the "Default encryption" section, click on "Edit".
Select the encryption type you want to use (e.g. AES-256 or AWS-KMS).
Click on "Save" to enable server-side encryption for the objects in the bucket.
Alternatively, you can use the AWS Command Line Interface (CLI) to enable server-side encryption for S3 objects by running the following command:
aws s3api put-bucket-encryption --bucket YOUR_BUCKET_NAME --server-side-encryption-configuration '{"Rules":[{"ApplyServerSideEncryptionByDefault":{"SSEAlgorithm":"AES256"}}]}'
Replace YOUR_BUCKET_NAME with the name of your S3 bucket. This command will enable server-side encryption using AES-256 for the objects in the specified bucket.