We have a need to protect the data that is stored within Druid on a per-user basis. I know that it is possible to do User Authentication via Servlet Filters, but we need to go a step beyond and provide User Authorization as well. The data we are ingesting will be tagged with different permissions / access levels and our users are each granted different permissions / access levels that we need to use to show users only the data they are allowed to see. This is similar to something like Oracle’s Label Security or providing row/cell/document/column level security on the data. As far as I know, there is not a built in way to accomplish this within druid. Does anyone have ideas of suggestions on how to accomplish this within druid? Without this, I’m not sure we will be able to use druid any more as our analytics store, so I’m really hoping we can come up with some kind of solution!