Ensure that your AWS S3 buckets enforce encryption of data over the network (as it travels to and from Amazon S3) using Secure Sockets Layer (SSL)
When S3 buckets are not configured to strictly require SSL connections, the communication between the clients (users, applications) and these buckets is vulnerable to eavesdropping and man-in-the-middle (MITM) attacks. Cloud Conformity strongly recommends enforcing SSL-only access by denying all regular, unencrypted HTTP requests to your buckets when dealing with sensitive or private data.
To determine if your Amazon S3 buckets are protecting data in transit using SSL, perform the following:
To enforce SSL-only access to your S3 buckets via access policies, perform the following actions: