Data security isn't a feature you switch on later
Permission concepts and traceability belong in the architecture, not in the aftermath.
Security that gets bolted on at the end usually turns out expensive and full of holes. That's why we plan for it from the concept stage.
That includes a clean permissions and roles concept, traceable logs, and the question of which data actually needs to flow where – and which is better off never leaving the environment at all.
The result isn't just more secure, it's also calmer to operate: you always know who's allowed to do what, and what happened.