I was asked by Delphix earlier this year to review their product with a particular focus on Oracle security of course. I wrote two papers; the first about Data Masking and Delphix and the second about securing data in non-production databases by taking the already secured production (assuming that it is secured of course) and then using Delphix to clone to non-production. If production already has a template of security then this is a great method as we get non-production already secured with just a small number of additional tasks that may need to be done in each clone database. In my experience most non-production databases are not secured to the same level as production and also often lack controls such as audit trails so taking a clone is a good way to not only replicate a database but also to replicate security.
I have added a link to the new Oracle Security in non-production paper to my
Oracle security white papers page and I have also updated the text for the masking paper and also the link as what I had originally from Delphix was a temporary link. Please have a look at both papers (Note: Delphix require you to do a simple registration to get the pdf papers)