The documented steps to do this are in the online and downloadable Delphix documentation for the masking engine.
To find this documentation, go to
docs.delphix.com, then click on
Masking, then click on either Delphix Masking Documentation in
HTML or in downloadable
PDF format.
In either display format, open the
Delphix Masking Admin Guide. Within that document, find the section on
Managing Algorithm Settings, and then find the section about
Adding New Masking Engine Algorithms. This will include instructions on how to create a new custom algorithm, and how to upload your own customized "lookup file" for that algorithm.
I don't know if there are any limits on the size(i.e. KB, MB, GB, etc) or any limits on the number of entries (i.e. hundreds of lines, thousands of lines, millions of lines, etc) of a custom "lookup file". Hopefully someone else in the community can share their knowledge on limits?
Please let me know if this helps?
Thanks!
-Tim