This is a mandatory requirement in certain PCI environments. Rather than just delete a file containing sensitive data using OS commands (or application APIs like the JAVA IO classes no doubt used by RPD), for PCI the file must be securely destroyed by invoking a utility to "delete" it. At present we do not have a way to do this as part of a jobs natural workflow life (via the RemoveJob step at the end of the workflow), nor for jobs deleted on demand through the UI. There may be other deletion scenarios to. As there are many options and utilities available for secure deletion, we would like this to be configurable please.
Here's an example for Linux servers:
scrub -p dod <filename>
There will be windows server equivalents to no doubt.