Which aws features should be used for secure communication between the EC2 Instance & S3?

 IAM Roles, Use AWS Identity and Access Management (IAM) roles to grant temporary security credentials to your EC2 instances. Attach a role to your EC2 instance with the necessary permissions to access the specific S3 buckets. This eliminates the need to store and manage long-term access keys on the EC2 instance.

IAM roles provide a secure and manageable solution for facilitating communication between EC2 instances and S3 buckets in AWS. By leveraging IAM roles, you enhance the security posture of your infrastructure, adhere to the principle of least privilege, and streamline the management of access to S3 resources. This approach not only ensures data security but also aligns with best practices for IAM and resource access in the AWS cloud environment.