Quartus

Hello, We recently purchased the latest version of Quartus and we have a few questions:

1. Are the design security features available for v12.1 Quartus?
2. Do we have to enable backward compatibility (How do we know which features will not work for earlier versions e.g. v12.1?)
3. We need to understand if the encryption tool is enabled and if not, what do we need to do to ensure that it gets enable?

Thank you