[ElFitz]

> I had thought homomorphic encryption could be used to do actual calculations, at least certain kinds.

Well yes. There was this:

- https://news.ycombinator.com/item?id=21638639

- https://news.ycombinator.com/item?id=31933995

- https://azeemba.com/posts/homomorphic-encryption-with-images...

And quite a few more.