SSL encryption

Encrypt intern node communication as well as client to cluster.

The database provides secure communication between a client and a database cluster, and between nodes in a cluster. Enabling SSL encryption ensures that data in flight is not compromised and is transferred securely. Client-to-node and node-to-node encryption are independently configured. Tools (cqlsh, nodetool) can be configured to use SSL encryption. The DataStax drivers can be configured to secure traffic between the driver and the database.