Encryption does not protect data that is accessed through applications and database clients, the most likely attack vector. Masking sensitive data before it gets to non-production systems is a critical tool in the security arsenal.
Delphix provides an add-on masking product for simple cost-effective integration. It is also possible to integrate Delphix with any masking technology. See Delphix Masking for details.
There are many topologies to consider, and the complete explanation of their pros and cons is outside the scope of this document. Delphix Professional Services can assist you in analyzing various masking solutions.