Should I think of it in terms of what I would throw in the trash? If I wouldn't mind throwing a document or paper in the trash it can go into EN. If I have a document that I would shred first that shouldn't go into EN? Really calls into question the usefulness of the app. Why use it if only non important data can go in there? To the hacker question. I assume by your concern that our data is not encrypted at rest? so if someone did hack the system, they would have non encrypted access to our data?